Q: 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.
[-57.678, 129.051, -52.696, -41.814, 225.866]
A:
40.546