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]: [225.697, 75.029]
[EX A]: 150.363

[EX Q]: [-82.094, 163.171, -35.384, 69.572]
[EX A]: 28.816

[EX Q]: [-37.399, -99.767, 226.415, 56.179]
[EX A]:
36.357