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]: [211.292, 92.275, 128.423, 242.327, -54.053, 89.501, 64.784]
[EX A]: 110.65

[EX Q]: [219.769, -36.26, 3.121, -22.5, 124.372]
[EX A]: 57.7

[EX Q]: [129.959, 90.299, 174.763, -89.515, 110.138, 19.796]
[EX A]:
72.573