Definition: 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.
Input: [-69.061, -85.651, 147.303, -45.692, -50.35, -4.203, 58.14, 2.056]

-5.932