Risk. Suppose you are evaluating the risk of 10 year US Treasury bonds. The returns from the previous five years are listed below.

Year	2016	2017	2018	2019	2020
10Yr TBonds Return	14.04%	2.97%	9.18%	10.75%	1.55%

a. Calculate the average annual return, the variance of returns, and the volatility of returns. (6 points)

b. Calculate the range of values we can be 95% sure returns will fall within. (4 points)

Step by Step how to solve for it please.