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: [142.225, 243.809, -41.935, 96.795, -99.067, 222.292, 113.486, 143.726]

SOLUTION: 102.666

PROBLEM: [203.976, 106.117, 62.128, -89.428, 180.453, 155.566, 213.868]

SOLUTION: 118.954

PROBLEM: [-38.265, 153.05, 57.987, 121.07, 212.804, -70.335, 234.799, 174.937, -75.684, 28.975]

SOLUTION:
79.934