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.

[229.28, 202.632, 129.717, 211.459, 203.204]
195.258

[245.2, 202.565]
223.882

[102.524, 88.129, 196.972]

129.208