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: [121.069, 12.661, 159.825, -39.645, 6.609, 156.735, 110.054, 112.875]

SOLUTION: 80.023

PROBLEM: [80.285, 75.631, 5.715, -68.695, 134.225, 22.744, 63.203, 136.862, 60.995]

SOLUTION: 56.774

PROBLEM: [215.885, 62.695, 17.33, 134.458, 195.467, 190.867]

SOLUTION:
136.117