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.

[64.523, 131.207, -30.223, -95.659]
17.462

[-40.509, 201.39]
80.44

[-56.22, 204.989, -35.251, -33.117, 110.167, 15.026]

34.266