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.

[-19.13, 98.86, 158.686, 230.23]
117.161

[193.711, 110.309, -20.334, 151.607, 158.797, -97.825, -59.931]
62.333

[79.537, 201.642, 234.113, 155.633, 150.038, 151.082, 46.438, 196.947]

151.929