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.

[165.242, 50.738, -34.087, 77.742, -21.241, -4.541]
38.976

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

[-6.982, 76.737, -68.014, 10.433, 229.902, 239.625, 15.505, -58.622, 90.128]

58.746