REALLY NEED HELP PLEASE!

EXPECTED RETURNS Stocks A and B have the following probability distributions of expected future returns:

Probability A B 0.2 (7%) (27%) 0.2 6 0 0.3 10 23 0.2 23 25 0.1 36 39

1.Calculate the expected rate of return, rB, for Stock B (rA = 11.00%.) Do not round intermediate calculations. Round your answer to two decimal places. %

3. Calculate the standard deviation of expected returns, A, for Stock A (B = 21.76%.) Do not round intermediate calculations. Round your answer to two decimal places. %

4. Now calculate the coefficient of variation for Stock B. Round your answer to two decimal places.