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.

[82.748, 43.804, -13.469, 226.705, -7.478]
66.462

[-63.278, 115.92, 179.699, 73.157]
76.374

[71.656, 66.033, 77.774, -95.615]

29.962