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.

[142.225, 243.809, -41.935, 96.795, -99.067, 222.292, 113.486, 143.726]
102.666

[-4.969, 232.548, 81.586, 13.448, -85.528, -1.661, -76.971]
22.636

[-12.868, 221.475, 55.063, 25.342, 157.255, -32.29]

68.996