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.

[41.573, 107.077, 26.564, -66.491, -90.163, 199.995, -28.782]
27.11

[245.271, 40.965, 133.913, 212.104]
158.063

[169.344, 51.979, 150.113, 6.619, -60.536, 134.488, -90.731]

51.611