TASK DEFINITION: In this task you will be given a list of numbers and you need to find the mean (average) of that list. The mean of a list can be found by summing every number in the list then dividing the result by the size of that list. The output should be rounded to 3 decimal places.
PROBLEM: [198.958, 97.355]

SOLUTION: 148.156

PROBLEM: [203.498, -79.59, -73.767, -65.942, -8.693]

SOLUTION: -4.899

PROBLEM: [88.089, 229.23]

SOLUTION:
158.659