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.

[-94.286, 148.737, 234.8, 148.972]
109.556

[116.268, 173.27, 228.827, 52.695, 66.445, -34.051, 152.137]
107.942

[192.228, 208.794, -43.076, 57.256, -55.916, -53.493]

50.966