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.

[-65.295, 113.842, -82.683, 235.996, 143.686, 31.127, 135.386, 217.657, -87.331]
71.376

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

[113.626, 85.944, 91.318, 34.374, 166.521, 195.567, 171.298, -57.102, -40.545, 101.75]

86.275