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.

[-82.094, 163.171, -35.384, 69.572]
28.816

[219.769, -36.26, 3.121, -22.5, 124.372]
57.7

[126.658, -72.552, 194.637, 110.031, -58.383, 46.234, 145.996]

70.374