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]: [113.238, 247.072, -31.448, -33.563, 74.519, 67.841]
[EX A]: 72.943

[EX Q]: [169.421, 88.16]
[EX A]: 128.791

[EX Q]: [127.009, 113.502, -70.799, -97.27]
[EX A]:
18.11