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.

[-3.302, 23.685, 69.661, 74.979, -46.96]
23.613

[-42.956, 89.597, -60.477, 101.972, 77.479]
33.123

[29.291, 47.611, 216.598, -66.688, 16.263, 93.893, -36.567]

42.914