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]: [171.805, 71.031, 36.192, 28.948, -58.045, 53.843]
[EX A]: 50.629

[EX Q]: [248.385, -40.468, -97.132]
[EX A]: 36.928

[EX Q]: [-76.417, 184.497, 170.684, -35.367, 45.159, 207.202, 109.671]
[EX A]:
86.49