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.

[-61.905, -98.66, 90.472, 237.317, 5.243, 196.933]
61.567

[194.983, -22.961, 95.798, -2.34, 178.547, -90.942, 122.52, 109.389]
73.124

[217.978, 70.977, 31.129, -87.408, -99.013, 249.862, -87.151, 207.527, 43.432]

60.815