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.

[24.119, 239.006, 239.873, 236.27, 134.34]
174.722

[126.136, -23.429, -25.125, -32.203, 36.405, 44.406, 147.828, -97.708, -69.793, 235.046]
34.156

[-15.279, 143.003, -7.511]

40.071