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.

[100.422, 199.731, 138.971, 95.515, 9.517]
108.831

[246.744, 206.484, 194.841]
216.023

[31.787, 236.049, -29.286]

79.517