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]: [87.258, 29.558, -48.199, -28.615, 46.642]
[EX A]: 17.329

[EX Q]: [38.343, 177.478, 120.174, -74.923, 98.159]
[EX A]: 71.846

[EX Q]: [164.352, -35.444, 209.935, 39.784, 28.937]
[EX A]:
81.513