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.

[EX Q]: [-66.735, 23.822, -34.5, 118.327, 242.333]
[EX A]: 56.649

[EX Q]: [-30.66, 134.777, 39.637, -41.053, 60.502, -99.875, -32.055, 51.52, 216.645, 11.994]
[EX A]: 31.143

[EX Q]: [81.674, -99.165, 56.344, 109.216]
[EX A]:
37.017