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.

[-47.309, -46.076, 191.14, -6.032, 4.858]
19.316

[-48.12, 192.63, 32.454, 132.703, -26.044, 140.006, -8.624, 38.438]
56.68

[-76.519, -96.704, 45.765, -80.415, 43.483, 138.834, 8.465, 182.381, -22.006]

15.92