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.

[-56.201, -77.67, -75.53, -51.92, 146.416, 141.525]
4.437

[-24.069, 49.942, -56.199, 147.337, 81.429, 198.62, -91.886, 33.842, -16.712, -51.661]
27.064

[20.574, 6.221, 203.153, -18.397, -97.477, -81.954, 173.713, 161.705, 62.545, 74.868]

50.495