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]: [203.498, -79.59, -73.767, -65.942, -8.693]
[EX A]: -4.899

[EX Q]: [151.151, 144.049, 217.252]
[EX A]: 170.817

[EX Q]: [132.779, 126.164, 97.743, -59.174, -55.441]
[EX A]:
48.414