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: [218.46, 7.937, 155.624, 82.813, 93.516]

SOLUTION: 111.67

PROBLEM: [57.506, 172.357, 191.473, 131.849]

SOLUTION: 138.296

PROBLEM: [187.859, 5.186, 143.174, 14.744, 234.39, 236.253, 168.56, -28.843, 231.697, 148.735]

SOLUTION:
134.176