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.

[169.737, 56.872, 102.557, -9.77]
79.849

[149.451, 230.29, 56.327, -72.328, -73.276, -90.669, 206.191, 87.481]
61.683

[133.16, 81.145, 146.723, -65.282, -94.442, -11.916, 76.301, 213.8]

59.936