Fix mistake on indexing

Author: Renato Rocha Souza

Exercises/EN/Basic/03_Lists_and_For_Loops_Solutions.ipynb

@@ -466,14 +466,14 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 12,
+   "execution_count": 1,
    "metadata": {},
    "outputs": [
     {
      "name": "stdout",
      "output_type": "stream",
      "text": [
-      "4.166666666666667\n"
+      "4.0\n"
      ]
     }
    ],
@@ -489,7 +489,7 @@
     "# Question 1:\n",
     "fb_rating_data = [row_one[0], row_one[3], row_one[-1]]\n",
     "insta_rating_data = [row_two[0], row_two[3], row_two[-1]]\n",
-    "pan_rating_data = [row_three[0], row_three[3], row_three[-1]]\n",
+    "pan_rating_data = [row_five[0], row_five[3], row_five[-1]]\n",
     "\n",
     "# Question 2:\n",
     "avg_rating = (fb_rating_data[-1] + insta_rating_data[-1] + pan_rating_data [-1])/3\n",