Update challenge and structure welcome/guide

Challenge3_Open.ipynb

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+{
+ "cells": [
+  {
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+   "id": "f6b37abb-e3fe-43d0-8527-783a84f457de",
+   "metadata": {},
+   "source": [
+    "# Challenge III – Open Challenge pick your own topic and assemble a team \n",
+    "![open challenge](https://www.nairaland.com/attachments/1951313_openchallenge_jpeg486cbc900da03112763d6a527d81e2d6)\n",
+    "\n",
+    "There may be projects where you're looking for additional help in solving some hurdles. In this challenge you can pick a topic of your liking but we do like to ask you to find at least 1 team member who can join you in your team. \n",
+    "\n",
+    "## Objectives \n",
+    "\n",
+    "1. Try to simplify the problem at hand  \n",
+    "\n",
+    "2. Find a solution\n",
+    "\n",
+    "3. Present your results on a Jupyter notebook. \n",
+    "\n",
+    "## What we ask of you if you go for this topic\n",
+    "* A concise problem definition (simplify the problem as much as possible)\n",
+    "* Find a team to help you\n"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
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+   "language": "python",
+   "name": "python3"
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+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
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+   "pygments_lexer": "ipython3",
+   "version": "3.8.5"
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+}

Welcome.ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "4fc5da8a-9e7a-4571-a286-c89cf81b2283",
+   "metadata": {},
+   "source": [
+    "# Welcome to the WRS hackathon\n",
+    "\n",
+    "## Goals & expectations\n",
+    "\n",
+    "## Schedule\n",
+    "\n",
+    "\n",
+    "\n"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
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+   "version": "3.8.5"
+  }
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+ "nbformat_minor": 5
+}