Rerun solution with Python 3.8 on 350

Mission350Solutions.ipynb

@@ -1976,7 +1976,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.7.6"
+   "version": "3.8.2"
   }
  },
  "nbformat": 4,