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.

[-10.287, -0.47, 195.152, 209.845, -64.645, -82.959, 106.327]
50.423

[1.435, 246.462, 5.433, -3.093, 31.948, 113.344, 41.816, 43.437, -93.129, 116.292]
50.395

[-17.604, 15.108, 34.328, -94.608]

-15.694