You've collected the following historical rates of return for stocks A and B:

Year (t)	rA,t	rB,t
2016	0.02	0.02
2015	0.08	0.05
2014	0.19	0.07

1. What was the average annual return for stock A

2. What was the average annual return for stock B?

3. What was the standard deviation of returns for stock A?

4.What was the standard deviation of returns for stock B?