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.

[72.755, 233.932, 245.785, 92.401]
161.218

[112.53, -67.079, 177.313, 230.482, 57.316, -37.564]
78.833

[-19.267, 8.117, 222.415, -74.803]

34.116