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.

[-28.982, -63.182, 22.408, 30.425, 125.743, 16.816, 96.711, 215.027, 32.552]
49.724

[22.306, 72.768, 218.947, 52.973, 100.121, 157.59, -92.109]
76.085

[15.084, 127.71, 178.5, 243.251, -85.93]

95.723