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]: [202.724, 129.438, -75.21, 114.102, 151.266]
[EX A]: 104.464

[EX Q]: [-34.026, 86.773, 149.194, 228.14]
[EX A]: 107.52

[EX Q]: [-17.176, 107.819, 110.164]
[EX A]:
66.936