diff --git a/Exercises_1.ipynb b/Exercises_1.ipynb
index 4a656d2..60157de 100644
--- a/Exercises_1.ipynb
+++ b/Exercises_1.ipynb
@@ -1,6 +1,7 @@
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@@ -15,6 +16,7 @@
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@@ -25,7 +27,7 @@
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+   "execution_count": 1,
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    "source": [
@@ -38,7 +40,7 @@
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+   "execution_count": 2,
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    "source": [
@@ -49,14 +51,201 @@
   },
   {
    "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
+   "execution_count": 3,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/html": [
+       "<div>\n",
+       "<style scoped>\n",
+       "    .dataframe tbody tr th:only-of-type {\n",
+       "        vertical-align: middle;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe tbody tr th {\n",
+       "        vertical-align: top;\n",
+       "    }\n",
+       "\n",
+       "    .dataframe thead th {\n",
+       "        text-align: right;\n",
+       "    }\n",
+       "</style>\n",
+       "<table border=\"1\" class=\"dataframe\">\n",
+       "  <thead>\n",
+       "    <tr style=\"text-align: right;\">\n",
+       "      <th></th>\n",
+       "      <th>Date</th>\n",
+       "      <th>Day</th>\n",
+       "      <th>Month</th>\n",
+       "      <th>Year</th>\n",
+       "      <th>Customer_Age</th>\n",
+       "      <th>Age_Group</th>\n",
+       "      <th>Customer_Gender</th>\n",
+       "      <th>Country</th>\n",
+       "      <th>State</th>\n",
+       "      <th>Product_Category</th>\n",
+       "      <th>Sub_Category</th>\n",
+       "      <th>Product</th>\n",
+       "      <th>Order_Quantity</th>\n",
+       "      <th>Unit_Cost</th>\n",
+       "      <th>Unit_Price</th>\n",
+       "      <th>Profit</th>\n",
+       "      <th>Cost</th>\n",
+       "      <th>Revenue</th>\n",
+       "    </tr>\n",
+       "  </thead>\n",
+       "  <tbody>\n",
+       "    <tr>\n",
+       "      <th>0</th>\n",
+       "      <td>2013-11-26</td>\n",
+       "      <td>26</td>\n",
+       "      <td>November</td>\n",
+       "      <td>2013</td>\n",
+       "      <td>19</td>\n",
+       "      <td>Youth (&lt;25)</td>\n",
+       "      <td>M</td>\n",
+       "      <td>Canada</td>\n",
+       "      <td>British Columbia</td>\n",
+       "      <td>Accessories</td>\n",
+       "      <td>Bike Racks</td>\n",
+       "      <td>Hitch Rack - 4-Bike</td>\n",
+       "      <td>8</td>\n",
+       "      <td>45</td>\n",
+       "      <td>120</td>\n",
+       "      <td>590</td>\n",
+       "      <td>360</td>\n",
+       "      <td>950</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>1</th>\n",
+       "      <td>2015-11-26</td>\n",
+       "      <td>26</td>\n",
+       "      <td>November</td>\n",
+       "      <td>2015</td>\n",
+       "      <td>19</td>\n",
+       "      <td>Youth (&lt;25)</td>\n",
+       "      <td>M</td>\n",
+       "      <td>Canada</td>\n",
+       "      <td>British Columbia</td>\n",
+       "      <td>Accessories</td>\n",
+       "      <td>Bike Racks</td>\n",
+       "      <td>Hitch Rack - 4-Bike</td>\n",
+       "      <td>8</td>\n",
+       "      <td>45</td>\n",
+       "      <td>120</td>\n",
+       "      <td>590</td>\n",
+       "      <td>360</td>\n",
+       "      <td>950</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>2</th>\n",
+       "      <td>2014-03-23</td>\n",
+       "      <td>23</td>\n",
+       "      <td>March</td>\n",
+       "      <td>2014</td>\n",
+       "      <td>49</td>\n",
+       "      <td>Adults (35-64)</td>\n",
+       "      <td>M</td>\n",
+       "      <td>Australia</td>\n",
+       "      <td>New South Wales</td>\n",
+       "      <td>Accessories</td>\n",
+       "      <td>Bike Racks</td>\n",
+       "      <td>Hitch Rack - 4-Bike</td>\n",
+       "      <td>23</td>\n",
+       "      <td>45</td>\n",
+       "      <td>120</td>\n",
+       "      <td>1366</td>\n",
+       "      <td>1035</td>\n",
+       "      <td>2401</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>3</th>\n",
+       "      <td>2016-03-23</td>\n",
+       "      <td>23</td>\n",
+       "      <td>March</td>\n",
+       "      <td>2016</td>\n",
+       "      <td>49</td>\n",
+       "      <td>Adults (35-64)</td>\n",
+       "      <td>M</td>\n",
+       "      <td>Australia</td>\n",
+       "      <td>New South Wales</td>\n",
+       "      <td>Accessories</td>\n",
+       "      <td>Bike Racks</td>\n",
+       "      <td>Hitch Rack - 4-Bike</td>\n",
+       "      <td>20</td>\n",
+       "      <td>45</td>\n",
+       "      <td>120</td>\n",
+       "      <td>1188</td>\n",
+       "      <td>900</td>\n",
+       "      <td>2088</td>\n",
+       "    </tr>\n",
+       "    <tr>\n",
+       "      <th>4</th>\n",
+       "      <td>2014-05-15</td>\n",
+       "      <td>15</td>\n",
+       "      <td>May</td>\n",
+       "      <td>2014</td>\n",
+       "      <td>47</td>\n",
+       "      <td>Adults (35-64)</td>\n",
+       "      <td>F</td>\n",
+       "      <td>Australia</td>\n",
+       "      <td>New South Wales</td>\n",
+       "      <td>Accessories</td>\n",
+       "      <td>Bike Racks</td>\n",
+       "      <td>Hitch Rack - 4-Bike</td>\n",
+       "      <td>4</td>\n",
+       "      <td>45</td>\n",
+       "      <td>120</td>\n",
+       "      <td>238</td>\n",
+       "      <td>180</td>\n",
+       "      <td>418</td>\n",
+       "    </tr>\n",
+       "  </tbody>\n",
+       "</table>\n",
+       "</div>"
+      ],
+      "text/plain": [
+       "        Date  Day     Month  Year  Customer_Age       Age_Group   \n",
+       "0 2013-11-26   26  November  2013            19     Youth (<25)  \\\n",
+       "1 2015-11-26   26  November  2015            19     Youth (<25)   \n",
+       "2 2014-03-23   23     March  2014            49  Adults (35-64)   \n",
+       "3 2016-03-23   23     March  2016            49  Adults (35-64)   \n",
+       "4 2014-05-15   15       May  2014            47  Adults (35-64)   \n",
+       "\n",
+       "  Customer_Gender    Country             State Product_Category Sub_Category   \n",
+       "0               M     Canada  British Columbia      Accessories   Bike Racks  \\\n",
+       "1               M     Canada  British Columbia      Accessories   Bike Racks   \n",
+       "2               M  Australia   New South Wales      Accessories   Bike Racks   \n",
+       "3               M  Australia   New South Wales      Accessories   Bike Racks   \n",
+       "4               F  Australia   New South Wales      Accessories   Bike Racks   \n",
+       "\n",
+       "               Product  Order_Quantity  Unit_Cost  Unit_Price  Profit  Cost   \n",
+       "0  Hitch Rack - 4-Bike               8         45         120     590   360  \\\n",
+       "1  Hitch Rack - 4-Bike               8         45         120     590   360   \n",
+       "2  Hitch Rack - 4-Bike              23         45         120    1366  1035   \n",
+       "3  Hitch Rack - 4-Bike              20         45         120    1188   900   \n",
+       "4  Hitch Rack - 4-Bike               4         45         120     238   180   \n",
+       "\n",
+       "   Revenue  \n",
+       "0      950  \n",
+       "1      950  \n",
+       "2     2401  \n",
+       "3     2088  \n",
+       "4      418  "
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
    "source": [
     "sales.head()"
    ]
   },
   {
+   "attachments": {},
    "cell_type": "markdown",
    "metadata": {},
    "source": [
@@ -75,6 +264,7 @@
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     "cell_type": "hint"
@@ -95,6 +285,7 @@
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@@ -133,6 +324,7 @@
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@@ -162,6 +354,7 @@
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@@ -200,6 +393,7 @@
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@@ -229,6 +423,7 @@
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@@ -256,6 +451,7 @@
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@@ -285,6 +481,7 @@
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@@ -312,6 +509,7 @@
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@@ -352,6 +550,7 @@
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@@ -379,6 +578,7 @@
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@@ -410,6 +610,7 @@
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@@ -437,6 +638,7 @@
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@@ -499,6 +702,7 @@
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@@ -530,6 +734,7 @@
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@@ -594,6 +800,7 @@
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@@ -745,6 +956,7 @@
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@@ -1199,6 +1425,7 @@
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@@ -1313,7 +1543,7 @@
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-   "version": "3.8.1"
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