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: [126.453, 169.516, 109.837, 208.695, 113.906, 56.894, 171.345, 126.81]

SOLUTION: 135.432

PROBLEM: [-9.301, -10.629, 88.777, 68.965]

SOLUTION: 34.453

PROBLEM: [225.5, 241.277, -75.542, 205.786, 40.919, 55.15]

SOLUTION:
115.515

