I Need The Answers For Part 3 and Part Four

You've collected the following historical rates of return for stocks A and B : - Attempt 1/5 for 10 pts. What was the average annual return for stock A rAA=3r1+r2+r3=30.02+0.08+0.19=0.0967 Part 2 EI in Atfernpt t/s for 10 pts. What was the average annual return for stock B? Correct 4 r11=3r1+r2+r3=30.02+0.05+0.07=0.04667 What was the standard deviation of returns for stock A? What was the standard deviation of returns for stock B