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.

[73.603, -84.154, 222.739, 205.594, 215.842]
126.725

[-63.278, 115.92, 179.699, 73.157]
76.374

[119.218, 92.798, -70.939, -42.105, 12.344]

22.263

