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.

[10.724, -65.993, 107.56, 154.38, 117.135, 114.495, 11.544]
64.264

[132.779, 126.164, 97.743, -59.174, -55.441]
48.414

[64.657, -99.347, -66.841, -80.124, -68.217, 122.268, 221.067]

13.352