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: [11.642, -39.595, 23.351, 168.447, 244.85, 108.958, 80.422, -14.774, 138.977]

SOLUTION: 80.253

PROBLEM: [112.53, -67.079, 177.313, 230.482, 57.316, -37.564]

SOLUTION: 78.833

PROBLEM: [108.431, -57.37, 228.857, 229.587, 206.483]

SOLUTION:
143.198