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.

[-28.982, -63.182, 22.408, 30.425, 125.743, 16.816, 96.711, 215.027, 32.552]
49.724

[-66.271, 56.586, -21.072, 136.915, 54.951, 112.054]
45.527

[23.632, 47.911, 95.884, 239.46, -68.225, 80.094, 111.959]

75.816