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: [147.664, 167.561, 244.106, -42.988, 9.425, 79.806, 239.58]

SOLUTION: 120.736

PROBLEM: [196.683, 97.538, 247.799, 203.036, 203.369, -15.737]

SOLUTION: 155.448

PROBLEM: [-11.185, 155.576, 158.21, 183.976, -62.539]

SOLUTION:
84.808