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.

[199.728, -96.25, -77.714]
8.588

[-92.167, -67.984, -31.831, -21.057, 101.792, 114.116, 185.901, -25.874]
20.362

[237.7, 90.125, -2.777]

108.349