diff --git a/module3/exo3/.ipynb b/module3/exo3/.ipynb
index 42d7efb3b457e20031fee07ecbe39374dfa491ec..0cd0f4bd5c3ac48f8f96a6310fb4aee4633a5d38 100644
--- a/module3/exo3/.ipynb
+++ b/module3/exo3/.ipynb
@@ -1081,7 +1081,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [
     {
@@ -1099,7 +1099,7 @@
        " 'seasonally_adjusted_filled']"
       ]
      },
-     "execution_count": 5,
+     "execution_count": 6,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1118,7 +1118,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 8,
+   "execution_count": 7,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -1134,7 +1134,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 9,
+   "execution_count": 8,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -1150,7 +1150,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 10,
+   "execution_count": 9,
    "metadata": {},
    "outputs": [
     {
@@ -1195,7 +1195,7 @@
        "Index: []"
       ]
      },
-     "execution_count": 10,
+     "execution_count": 9,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1213,7 +1213,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 11,
+   "execution_count": 10,
    "metadata": {},
    "outputs": [
     {
@@ -1230,7 +1230,7 @@
        "dtype: object"
       ]
      },
-     "execution_count": 11,
+     "execution_count": 10,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1248,7 +1248,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 12,
+   "execution_count": 11,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -1272,7 +1272,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 13,
+   "execution_count": 12,
    "metadata": {},
    "outputs": [
     {
@@ -1289,7 +1289,7 @@
        "dtype: object"
       ]
      },
-     "execution_count": 13,
+     "execution_count": 12,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1307,7 +1307,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 14,
+   "execution_count": 13,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -1323,7 +1323,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 15,
+   "execution_count": 14,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -1339,7 +1339,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 28,
+   "execution_count": 15,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -1356,7 +1356,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 29,
+   "execution_count": 16,
    "metadata": {},
    "outputs": [
     {
@@ -1456,7 +1456,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 90,
+   "execution_count": 17,
    "metadata": {},
    "outputs": [
     {
@@ -1465,7 +1465,7 @@
        "0.1511674880564176"
       ]
      },
-     "execution_count": 90,
+     "execution_count": 17,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1510,18 +1510,19 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 64,
+   "execution_count": 18,
    "metadata": {},
    "outputs": [
     {
-     "data": {
-      "text/plain": [
-       "355.3829380053908"
-      ]
-     },
-     "execution_count": 64,
-     "metadata": {},
-     "output_type": "execute_result"
+     "ename": "NameError",
+     "evalue": "name 'sumy' is not defined",
+     "output_type": "error",
+     "traceback": [
+      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
+      "\u001b[0;31mNameError\u001b[0m                                 Traceback (most recent call last)",
+      "\u001b[0;32m<ipython-input-18-c9779bdd860a>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mb\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0msumy\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m/\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mN\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m      2\u001b[0m \u001b[0mb\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
+      "\u001b[0;31mNameError\u001b[0m: name 'sumy' is not defined"
+     ]
     }
    ],
    "source": [
@@ -1550,7 +1551,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 78,
+   "execution_count": 19,
    "metadata": {},
    "outputs": [
     {
@@ -1559,7 +1560,7 @@
        "420.53612535770685"
       ]
      },
-     "execution_count": 78,
+     "execution_count": 19,
      "metadata": {},
      "output_type": "execute_result"
     }
@@ -1572,16 +1573,16 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 81,
+   "execution_count": 20,
    "metadata": {},
    "outputs": [
     {
      "data": {
       "text/plain": [
-       "[<matplotlib.lines.Line2D at 0x7fe9d0ef6b70>]"
+       "[<matplotlib.lines.Line2D at 0x7f22ff91fef0>]"
       ]
      },
-     "execution_count": 81,
+     "execution_count": 20,
      "metadata": {},
      "output_type": "execute_result"
     },