Intro You've collected the following historical rates of return for stocks A and B: Year (t) RA, RB,t 2016 0.02 0.02 2015 0.08 0.05 2014 0.15 0.07 Part 3 What was the standard deviation of returns for stock A? 3+ decimals Submit Part 4 What was the standard deviation of returns for stock B? 4+ decimals Submit Attempt 1/10 for 1 pts. Attempt 1/10 for 1 pts