diff --git a/exe_cell_test/01_exe.ipynb b/exe_cell_test/01_exe.ipynb
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+++ b/exe_cell_test/01_exe.ipynb
@@ -0,0 +1,157 @@
+{
+ "cells": [
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "nbgrader": {
+     "grade": false,
+     "locked": true,
+     "solution": false
+    }
+   },
+   "source": [
+    "<figure>\n",
+    "  <IMG SRC=\"https://raw.githubusercontent.com/mbakker7/exploratory_computing_with_python/master/tudelft_logo.png\" WIDTH=250 ALIGN=\"right\">\n",
+    "</figure>\n",
+    "\n",
+    "\n",
+    "# Advanced strings and functions. Files and debugging Exercises."
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "nbgrader": {
+     "grade": false,
+     "locked": true,
+     "solution": false
+    }
+   },
+   "source": [
+    "## Exercise 3.1.1\n",
+    "\n",
+    "Use the <code>print()</code> function and an f-string to make a statement about some car using all variables stored in the <code>car_info</code> dictionary.\n"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true,
+    "nbgrader": {
+     "grade": false,
+     "locked": true,
+     "solution": false
+    }
+   },
+   "outputs": [],
+   "source": [
+    "# you do not have to change anything in this cell\n",
+    "car_info = {\n",
+    "    'top_speed' : '229', #km/h\n",
+    "    'type' : 'Opel Astra'\n",
+    "}\n",
+    "\n",
+    "#start your code here:\n",
+    "#---------------------\n"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {
+    "nbgrader": {
+     "grade": false,
+     "locked": true,
+     "solution": false
+    }
+   },
+   "source": [
+    "## Exercise 3.1.2\n",
+    "\n",
+    "Print the value of <b>π</b> using $4$ decimal places."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {
+    "collapsed": true
+   },
+   "outputs": [],
+   "source": [
+    "# write your code here\n",
+    "rounded_pi = ...\n",
+    "\n",
+    "#start your code here:\n",
+    "#---------------------\n",
+    "\n"
+   ]
+  },
+  {
+   "attachments": {},
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "A dummy example"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "import numpy as np\n",
+    "some_array = np.array([1,2,3,4,5,6,7,8,9,10])   \n",
+    "print(some_array)\n"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3.7",
+   "language": "python",
+   "name": "python37"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.7.5"
+  },
+  "latex_envs": {
+   "LaTeX_envs_menu_present": true,
+   "autoclose": false,
+   "autocomplete": true,
+   "bibliofile": "biblio.bib",
+   "cite_by": "apalike",
+   "current_citInitial": 1,
+   "eqLabelWithNumbers": true,
+   "eqNumInitial": 1,
+   "hotkeys": {
+    "equation": "Ctrl-E",
+    "itemize": "Ctrl-I"
+   },
+   "labels_anchors": false,
+   "latex_user_defs": false,
+   "report_style_numbering": false,
+   "user_envs_cfg": false
+  },
+  "vscode": {
+   "interpreter": {
+    "hash": "1fe2f2b718b1108b9c4176932db8a0ead471245140baaa21ea96a4066683e6b2"
+   }
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}