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]: [-31.241, 73.981, 127.71, 166.275, 35.028, -10.432]
[EX A]: 60.22

[EX Q]: [57.478, 212.225, -90.816, -10.092, 238.514, 60.36, 59.627]
[EX A]: 75.328

[EX Q]: [174.54, 146.255, 25.722, 197.448]
[EX A]:
135.991