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.

[13.21, 76.551, 51.016, 230.763, 149.792, 157.216, 117.414, 144.272, 5.805, 118.165]
106.42

[-96.182, -37.177, 130.645, -44.92, -12.78, 90.335, -99.791, -11.926, 217.275]
15.053

[70.748, 145.924, 213.55, -15.446, 219.555, 89.961]

120.715