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.

[-28.295, -24.828, -66.96, -12.108, -96.597, 110.99, 172.86, -18.752, 157.717]
21.559

[120.682, 53.847]
87.264

[95.711, 18.548, 28.083, 65.988, -43.727, 4.801, 31.114, 164.925]

45.68

