Question 3:

a) Write a python function that calculates the mean of a list of values.

b) Write a python function that calculates the standard deviation of a list of values.

c) Execute the functions created in a- and b- to calculate the mean and the standard deviation of the following [1, 2, 1, 3, 1, 4.1, 4, 2, 2.1, 1.5].