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.

[38.343, 177.478, 120.174, -74.923, 98.159]
71.846

[38.24, 196.576, -84.173, -45.001, 1.607, 170.177, 234.811, -60.183, -91.513]
40.06

[205.064, -88.28, 150.536, 239.481, 194.547, 129.264, 39.825, 208.173, -20.063, -60.007]

99.854