After multiple sessions with differnt tutors, we found the the code provided in the MCForecastTool.py was not correct. We had to go into the provided code and change it so that we were able to append metrics and get our CI levels.
Optional Challenge : I choose to do the 5 year retirement with an initial investment of $50k (optional part of the assignment), the results of the retirement protfolio were as follows: Ther is over a 95% chance that after the initial investment of $50,000 the final results would be between $50,665 and $95,772.