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.

[-84.771, 60.727, 165.566, 27.782, 159.929, 167.451, -64.15]
61.791

[244.1, -84.018, 7.772, 69.273, 99.397, 158.691, -0.315]
70.7

[19.958, 79.036, 36.158, 116.356, 189.271]

88.156