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.

[-98.163, -66.763, 149.544, -89.893, -10.155]
-23.086

[162.434, 99.656, 86.665, 13.03, 99.225, 43.608, -41.822, 206.671]
83.683

[148.014, 208.99, 215.84, 232.402, 239.919, -69.156]

162.668