Edited--- I need to be shown manually how to solve.

For Asset A and for Asset B, compute the average annual return, variance, standard deviation, and coefficient of variation for the annual returns given below. a. Asset A: 5%, 10%, 15%, 4% b. Asset B: -6%, 20%, 2%, -5%, 10%

How do I work this problem? I am not sure what formula to use or how to work it how step by step. Thank you.