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]: [-81.432, -63.059, 150.144, 55.203, 215.405, -89.797, 72.946]
[EX A]: 37.059

[EX Q]: [-81.785, -44.121]
[EX A]: -62.953

[EX Q]: [-33.711, -36.057, 246.847, 91.06, 151.965, 10.053, 20.21]
[EX A]:
64.338