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.

Q: [130.57, 157.221, 228.177, 32.361, 166.457]

A: 142.957
****
Q: [88.77, 109.102, -86.446, 207.301, 160.91, -12.956]

A: 77.78
****
Q: [-31.481, 140.369, 219.794, -7.293, 208.549, -32.35, 81.227]

A:
82.688
****