need solutions. work helps. trying to see where im missing.

Intro You've collected the following historical rates of return for stocks A and B: Year (t) rat "Bit 2016 0.02 0.04 2015 0.08 0.05 2014 0.17 0.07 Attempt 1/5 for 10 pts. Part 1 What was the average annual return for stock A 3+ decimals Submit 18 Attempt 1/5 for 10 pts. Part 2 What was the average annual return for stock B? 3+ decimals Submit Part 3 - Attempt 1/5 for 10 pts. What was the standard deviation of returns for stock A? 3+ decimals Submit Part 4 Attempt 1/5 for 10 pts. What was the standard deviation of returns for stock B? 4+ decimals Submit