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]: [120.682, 53.847]
[EX A]: 87.264

[EX Q]: [73.603, -84.154, 222.739, 205.594, 215.842]
[EX A]: 126.725

[EX Q]: [36.507, 88.236, 175.062, 47.782]
[EX A]:
86.897