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.

[Q]: [99.278, 72.353, -21.292]
[A]: 50.113


[Q]: [223.951, 2.518, 140.336, -38.799, 217.497, 212.153, 21.874]
[A]: 111.361


[Q]: [24.701, -82.473, -81.179, 40.441]
[A]:
-24.627