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]: [53.271, 224.646, -66.568, -23.058, -60.09, 178.437, -70.082, 131.116]
[EX A]: 45.959

[EX Q]: [171.439, 0.981, 42.253, 239.995, 129.938, -67.125, -69.565, -53.374, -51.357]
[EX A]: 38.132

[EX Q]: [158.197, 125.394, 249.532, 145.426, -38.449, -55.294, 24.725, 78.56, 180.519]
[EX A]:
96.512