diff --git a/module2/exo2/exercice.ipynb b/module2/exo2/exercice.ipynb
index d771c4a53e7ca4854fc9820153e5108de8c4aacc..b23f1151a79c463599cb5bf9bafefde20cdacc5f 100644
--- a/module2/exo2/exercice.ipynb
+++ b/module2/exo2/exercice.ipynb
@@ -1,8 +1,19 @@
 {
  "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Logbook – Week 2\n",
+    "\n",
+    "This week, I used Jupyter and completed excersises 2.1, 2.2 and 2.3.\n",
+    "I estimated π, did simple stats like mean and standard deviation, and made a sequence plot and histogram.  \n",
+    "The goal is to learn to keep code/tasks and notes in one place. \n"
+   ]
+  },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 6,
    "metadata": {},
    "outputs": [
     {
@@ -32,7 +43,7 @@
     "min_val = np.min(data)\n",
     "max_val = np.max(data)\n",
     "median_val = np.median(data)\n",
-    "std_val = np.std(data, ddof=1)  # Important: ddof=1 for corrected estimate\n",
+    "std_val = np.std(data, ddof=1) \n",
     "\n",
     "print(\"Mean:\", round(mean_val, 2))\n",
     "print(\"Min:\", round(min_val, 2))\n",