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.

[-2.772, 225.483, 211.749, 45.779, -82.623, 229.799, 107.783, 64.653]
99.981

[41.081, 166.314, -14.556, -84.648, -8.286]
19.981

[25.838, -12.098, 17.751, -17.256, -93.799]

-15.913