please answer all parts right

Intro The following table shows realized rates of return for two stocks. N 1 A B 1 Year Stock A Stock B 1 5% 15% 3 2 -14% -14% 4 3 -6% -8% 4 5% 28% 6 5 14% 8% 7 6 18% 5% 4 5 6 Part 1 1 Attempt 2/10 for 9 pts. What is the arithmetic average return for stock B? 3+ decimals Submit Attempt 1/10 for 10 pts. Part 2 What is the variance for stock B? 4+ decimals | Attempt 1/10 for 10 pts. Part 3 What is the covariance of returns? 4+ decimals Submit Part 4 - Attempt 1/10 for 10 pts. What is the arithmetic average return for a portfolio with 40% invested in stock A and the remainder in stock B (with annual rebalancing)? 4+ decimals Submit Part 5 - Attempt 1/10 for 10 pts. What is the variance of returns for a portfolio with 40% invested in stock A and the remainder in stock B (with annual rebalancing)? 4+ decimals Submit