diff --git a/wk7/wk7.ipynb b/wk7/wk7.ipynb
index 630da92..81f9806 100644
--- a/wk7/wk7.ipynb
+++ b/wk7/wk7.ipynb
@@ -35,113 +35,113 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 64,
+   "execution_count": 2,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/html": [
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        "            background-color:  #fc7f00;\n",
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        "            background-color:  #ff9d00;\n",
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        "            background-color:  #ffd20c;\n",
-       "        }    #T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col1 {\n",
+       "        }    #T_60af3fba_4c3b_11e8_903f_32001d384000row6_col1 {\n",
        "            background-color:  #ffbf01;\n",
-       "        }    #T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col2 {\n",
+       "        }    #T_60af3fba_4c3b_11e8_903f_32001d384000row6_col2 {\n",
        "            background-color:  #ffd50e;\n",
-       "        }    #T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col3 {\n",
+       "        }    #T_60af3fba_4c3b_11e8_903f_32001d384000row6_col3 {\n",
        "            background-color:  #f3f245;\n",
-       "        }    #T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col4 {\n",
+       "        }    #T_60af3fba_4c3b_11e8_903f_32001d384000row6_col4 {\n",
        "            background-color:  #ffbb00;\n",
-       "        }    #T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col5 {\n",
+       "        }    #T_60af3fba_4c3b_11e8_903f_32001d384000row6_col5 {\n",
        "            background-color:  #fe9a00;\n",
-       "        }    #T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col6 {\n",
+       "        }    #T_60af3fba_4c3b_11e8_903f_32001d384000row6_col6 {\n",
        "            background-color:  #fc7f00;\n",
        "        }</style>  \n",
-       "<table id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000\" > \n",
+       "<table id=\"T_60af3fba_4c3b_11e8_903f_32001d384000\" > \n",
        "<thead>    <tr> \n",
        "        <th class=\"blank level0\" ></th> \n",
        "        <th class=\"col_heading level0 col0\" >ranking</th> \n",
@@ -153,76 +153,76 @@
        "        <th class=\"col_heading level0 col6\" >height</th> \n",
        "    </tr></thead> \n",
        "<tbody>    <tr> \n",
-       "        <th id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000level0_row0\" class=\"row_heading level0 row0\" >ranking</th> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row0_col0\" class=\"data row0 col0\" >1</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row0_col1\" class=\"data row0 col1\" >-0.165935</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row0_col2\" class=\"data row0 col2\" >-0.586707</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row0_col3\" class=\"data row0 col3\" >-0.244073</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row0_col4\" class=\"data row0 col4\" >0.17403</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row0_col5\" class=\"data row0 col5\" >-0.0826093</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row0_col6\" class=\"data row0 col6\" >0.0196139</td> \n",
+       "        <th id=\"T_60af3fba_4c3b_11e8_903f_32001d384000level0_row0\" class=\"row_heading level0 row0\" >ranking</th> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row0_col0\" class=\"data row0 col0\" >1</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row0_col1\" class=\"data row0 col1\" >-0.165935</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row0_col2\" class=\"data row0 col2\" >-0.586707</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row0_col3\" class=\"data row0 col3\" >-0.244073</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row0_col4\" class=\"data row0 col4\" >0.17403</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row0_col5\" class=\"data row0 col5\" >-0.0826093</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row0_col6\" class=\"data row0 col6\" >0.0196139</td> \n",
        "    </tr>    <tr> \n",
-       "        <th id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000level0_row1\" class=\"row_heading level0 row1\" >age</th> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row1_col0\" class=\"data row1 col0\" >-0.165935</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row1_col1\" class=\"data row1 col1\" >1</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row1_col2\" class=\"data row1 col2\" >0.121731</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row1_col3\" class=\"data row1 col3\" >-0.140033</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row1_col4\" class=\"data row1 col4\" >-0.994296</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row1_col5\" class=\"data row1 col5\" >0.157223</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row1_col6\" class=\"data row1 col6\" >-0.0282972</td> \n",
+       "        <th id=\"T_60af3fba_4c3b_11e8_903f_32001d384000level0_row1\" class=\"row_heading level0 row1\" >age</th> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row1_col0\" class=\"data row1 col0\" >-0.165935</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row1_col1\" class=\"data row1 col1\" >1</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row1_col2\" class=\"data row1 col2\" >0.121731</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row1_col3\" class=\"data row1 col3\" >-0.140033</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row1_col4\" class=\"data row1 col4\" >-0.994296</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row1_col5\" class=\"data row1 col5\" >0.157223</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row1_col6\" class=\"data row1 col6\" >-0.0282972</td> \n",
        "    </tr>    <tr> \n",
-       "        <th id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000level0_row2\" class=\"row_heading level0 row2\" >points</th> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row2_col0\" class=\"data row2 col0\" >-0.586707</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row2_col1\" class=\"data row2 col1\" >0.121731</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row2_col2\" class=\"data row2 col2\" >1</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row2_col3\" class=\"data row2 col3\" >-0.004905</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row2_col4\" class=\"data row2 col4\" >-0.129971</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row2_col5\" class=\"data row2 col5\" >0.159385</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row2_col6\" class=\"data row2 col6\" >-0.0153843</td> \n",
+       "        <th id=\"T_60af3fba_4c3b_11e8_903f_32001d384000level0_row2\" class=\"row_heading level0 row2\" >points</th> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row2_col0\" class=\"data row2 col0\" >-0.586707</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row2_col1\" class=\"data row2 col1\" >0.121731</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row2_col2\" class=\"data row2 col2\" >1</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row2_col3\" class=\"data row2 col3\" >-0.004905</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row2_col4\" class=\"data row2 col4\" >-0.129971</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row2_col5\" class=\"data row2 col5\" >0.159385</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row2_col6\" class=\"data row2 col6\" >-0.0153843</td> \n",
        "    </tr>    <tr> \n",
-       "        <th id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000level0_row3\" class=\"row_heading level0 row3\" >tournplayed</th> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row3_col0\" class=\"data row3 col0\" >-0.244073</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row3_col1\" class=\"data row3 col1\" >-0.140033</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row3_col2\" class=\"data row3 col2\" >-0.004905</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row3_col3\" class=\"data row3 col3\" >1</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row3_col4\" class=\"data row3 col4\" >0.13293</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row3_col5\" class=\"data row3 col5\" >-0.139194</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row3_col6\" class=\"data row3 col6\" >-0.0712482</td> \n",
+       "        <th id=\"T_60af3fba_4c3b_11e8_903f_32001d384000level0_row3\" class=\"row_heading level0 row3\" >tournplayed</th> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row3_col0\" class=\"data row3 col0\" >-0.244073</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row3_col1\" class=\"data row3 col1\" >-0.140033</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row3_col2\" class=\"data row3 col2\" >-0.004905</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row3_col3\" class=\"data row3 col3\" >1</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row3_col4\" class=\"data row3 col4\" >0.13293</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row3_col5\" class=\"data row3 col5\" >-0.139194</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row3_col6\" class=\"data row3 col6\" >-0.0712482</td> \n",
        "    </tr>    <tr> \n",
-       "        <th id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000level0_row4\" class=\"row_heading level0 row4\" >born</th> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row4_col0\" class=\"data row4 col0\" >0.17403</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row4_col1\" class=\"data row4 col1\" >-0.994296</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row4_col2\" class=\"data row4 col2\" >-0.129971</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row4_col3\" class=\"data row4 col3\" >0.13293</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row4_col4\" class=\"data row4 col4\" >1</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row4_col5\" class=\"data row4 col5\" >-0.163677</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row4_col6\" class=\"data row4 col6\" >0.0333731</td> \n",
+       "        <th id=\"T_60af3fba_4c3b_11e8_903f_32001d384000level0_row4\" class=\"row_heading level0 row4\" >born</th> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row4_col0\" class=\"data row4 col0\" >0.17403</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row4_col1\" class=\"data row4 col1\" >-0.994296</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row4_col2\" class=\"data row4 col2\" >-0.129971</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row4_col3\" class=\"data row4 col3\" >0.13293</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row4_col4\" class=\"data row4 col4\" >1</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row4_col5\" class=\"data row4 col5\" >-0.163677</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row4_col6\" class=\"data row4 col6\" >0.0333731</td> \n",
        "    </tr>    <tr> \n",
-       "        <th id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000level0_row5\" class=\"row_heading level0 row5\" >weight</th> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row5_col0\" class=\"data row5 col0\" >-0.0826093</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row5_col1\" class=\"data row5 col1\" >0.157223</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row5_col2\" class=\"data row5 col2\" >0.159385</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row5_col3\" class=\"data row5 col3\" >-0.139194</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row5_col4\" class=\"data row5 col4\" >-0.163677</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row5_col5\" class=\"data row5 col5\" >1</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row5_col6\" class=\"data row5 col6\" >0.757689</td> \n",
+       "        <th id=\"T_60af3fba_4c3b_11e8_903f_32001d384000level0_row5\" class=\"row_heading level0 row5\" >weight</th> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row5_col0\" class=\"data row5 col0\" >-0.0826093</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row5_col1\" class=\"data row5 col1\" >0.157223</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row5_col2\" class=\"data row5 col2\" >0.159385</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row5_col3\" class=\"data row5 col3\" >-0.139194</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row5_col4\" class=\"data row5 col4\" >-0.163677</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row5_col5\" class=\"data row5 col5\" >1</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row5_col6\" class=\"data row5 col6\" >0.757689</td> \n",
        "    </tr>    <tr> \n",
-       "        <th id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000level0_row6\" class=\"row_heading level0 row6\" >height</th> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col0\" class=\"data row6 col0\" >0.0196139</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col1\" class=\"data row6 col1\" >-0.0282972</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col2\" class=\"data row6 col2\" >-0.0153843</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col3\" class=\"data row6 col3\" >-0.0712482</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col4\" class=\"data row6 col4\" >0.0333731</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col5\" class=\"data row6 col5\" >0.757689</td> \n",
-       "        <td id=\"T_75b4b348_4c3a_11e8_bc4a_32001d384000row6_col6\" class=\"data row6 col6\" >1</td> \n",
+       "        <th id=\"T_60af3fba_4c3b_11e8_903f_32001d384000level0_row6\" class=\"row_heading level0 row6\" >height</th> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row6_col0\" class=\"data row6 col0\" >0.0196139</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row6_col1\" class=\"data row6 col1\" >-0.0282972</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row6_col2\" class=\"data row6 col2\" >-0.0153843</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row6_col3\" class=\"data row6 col3\" >-0.0712482</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row6_col4\" class=\"data row6 col4\" >0.0333731</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row6_col5\" class=\"data row6 col5\" >0.757689</td> \n",
+       "        <td id=\"T_60af3fba_4c3b_11e8_903f_32001d384000row6_col6\" class=\"data row6 col6\" >1</td> \n",
        "    </tr></tbody> \n",
        "</table> "
       ],
       "text/plain": [
-       "<pandas.io.formats.style.Styler at 0x1127ee438>"
+       "<pandas.io.formats.style.Styler at 0x1103ce6a0>"
       ]
      },
-     "execution_count": 64,
+     "execution_count": 2,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -233,18 +233,18 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": 3,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "[<matplotlib.lines.Line2D at 0x1124a0400>,\n",
-       " <matplotlib.lines.Line2D at 0x1124a0550>,\n",
-       " <matplotlib.lines.Line2D at 0x1124a09b0>]"
+       "[<matplotlib.lines.Line2D at 0x117efed30>,\n",
+       " <matplotlib.lines.Line2D at 0x118391278>,\n",
+       " <matplotlib.lines.Line2D at 0x118391630>]"
       ]
      },
-     "execution_count": 10,
+     "execution_count": 3,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -274,7 +274,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 11,
+   "execution_count": 4,
    "metadata": {},
    "outputs": [
     {
@@ -283,7 +283,7 @@
        "-578.3045372326807"
       ]
      },
-     "execution_count": 11,
+     "execution_count": 4,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -294,16 +294,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 12,
+   "execution_count": 5,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "[<matplotlib.lines.Line2D at 0x11258da58>]"
+       "[<matplotlib.lines.Line2D at 0x118409d68>]"
       ]
      },
-     "execution_count": 12,
+     "execution_count": 5,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -324,16 +324,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 13,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "[<matplotlib.lines.Line2D at 0x1125f28d0>]"
+       "[<matplotlib.lines.Line2D at 0x1184d5c88>]"
       ]
      },
-     "execution_count": 13,
+     "execution_count": 6,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -354,16 +354,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 14,
+   "execution_count": 7,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "<matplotlib.collections.PolyCollection at 0x11264d3c8>"
+       "<matplotlib.collections.PolyCollection at 0x11852f6d8>"
       ]
      },
-     "execution_count": 14,
+     "execution_count": 7,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -386,7 +386,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 16,
+   "execution_count": 8,
    "metadata": {},
    "outputs": [
     {
@@ -395,7 +395,7 @@
        "Text(0,0.5,'points')"
       ]
      },
-     "execution_count": 16,
+     "execution_count": 8,
      "metadata": {},
      "output_type": "execute_result"
     },
@@ -425,7 +425,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 50,
+   "execution_count": 9,
    "metadata": {},
    "outputs": [
     {
@@ -446,7 +446,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 67,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [
     {
@@ -467,7 +467,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 66,
+   "execution_count": 11,
    "metadata": {},
    "outputs": [
     {
@@ -497,7 +497,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 44,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [
     {
@@ -528,7 +528,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 65,
+   "execution_count": 13,
    "metadata": {},
    "outputs": [
     {