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

SOLUTION: 118.954

PROBLEM: [79.132, 226.507, 40.498, 100.658, 75.361]

SOLUTION: 104.431

PROBLEM: [96.506, -66.874, -24.57, -51.21, -22.672, -17.062, -11.177, 21.295]

SOLUTION:
-9.47