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.

[-66.676, -7.063, -18.028, 13.407, 54.369, 148.394, -93.155]
4.464

[236.959, 159.123, 17.257, 241.561, 119.782, -3.56, -30.957]
105.738

[-81.46, 12.789, 157.191, 172.724, 36.927]

59.634