diff --git a/module3/exo1/analyse-syndrome-grippal.ipynb b/module3/exo1/analyse-syndrome-grippal.ipynb
index 1b28751ed74a4cbd3a47d758c4da7a95695d0a0e..039d6dc2623010fe6bfca789b3fb435aade8e8b9 100644
--- a/module3/exo1/analyse-syndrome-grippal.ipynb
+++ b/module3/exo1/analyse-syndrome-grippal.ipynb
@@ -2488,6 +2488,40 @@
     "yearly_incidence.hist(xrot=20)"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 16,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "5466192\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(max(yearly_incidence[year]))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "938731\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(min(yearly_incidence[year]))"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,