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.

[213.2, 159.287, 214.859, 189.464, 185.706, -85.847, 215.647, 8.545]
137.608

[-41.714, 218.588, 49.769, 142.519, 179.776, -99.226, 224.69, 191.642]
108.256

[-72.413, -92.68, -65.06, -7.577, -31.428, -34.342, 238.388, 69.535, 2.264]

0.743