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]: [155.467, -40.717, -24.529, -22.608, 38.752]
[EX A]: 21.273

[EX Q]: [-41.714, 218.588, 49.769, 142.519, 179.776, -99.226, 224.69, 191.642]
[EX A]: 108.256

[EX Q]: [-63.664, 188.246, 114.276, 213.132, 192.142, 175.503, 34.958]
[EX A]:
122.085