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: [-21.77, 172.703, -31.807, 129.587, 84.624, 14.279]

SOLUTION: 57.936

PROBLEM: [10.724, -65.993, 107.56, 154.38, 117.135, 114.495, 11.544]

SOLUTION: 64.264

PROBLEM: [50.384, 136.542, -5.113, 192.277, 69.184, 94.828, 198.389, 86.703]

SOLUTION:
102.899