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.

[73.603, -84.154, 222.739, 205.594, 215.842]
126.725

[192.74, 78.623, -5.937, 144.535]
102.49

[236.788, -67.805, 167.544, -44.744, -77.372, 116.16, 1.919, -52.538, 7.464, -57.925]

22.949