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]: [72.326, -74.6, 127.566, -54.848, 198.529, -44.061, -28.155]
[EX A]: 28.108

[EX Q]: [51.372, 141.276, 8.131, 168.539, 151.323]
[EX A]: 104.128

[EX Q]: [-18.488, 146.028, -11.256, -79.842, 106.739, 120.973, 152.344]
[EX A]:
59.5