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.

[207.804, 175.122, 13.63, 217.625, -98.484]
103.139

[-18.796, 194.818]
88.011

[141.324, 21.424]

81.374