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.

[-77.226, 44.49]
-16.368

[184.477, 178.133, 206.128, 148.349, 50.82, 33.624, 196.968, 179.804]
147.288

[77.47, 51.258]

64.364