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: [227.601, -61.961, 78.822, -29.52, 126.039, -44.098, 112.374, -19.23, 69.758]

SOLUTION: 51.087

PROBLEM: [-98.163, -66.763, 149.544, -89.893, -10.155]

SOLUTION: -23.086

PROBLEM: [97.623, 222.056, 66.541]

SOLUTION:
128.74

