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.

[-75.664, 192.225, 2.107, -86.22, -51.11]
-3.732

[43.554, 122.733, 40.669, 163.641]
92.649

[182.34, 105.105, 248.658, 104.174, -98.917, -47.707, -61.048, 241.903, -34.659, 31.89]

67.174