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

Probability	A	B
0.2	-15%	-27%
0.2	2	0
0.3	11	20
0.2	21	26
0.1	30	39

Calculate the expected rate of return, rB, for Stock B (rA = 7.90%.) Do not round intermediate calculations. Round your answer to two decimal places. %

Calculate the standard deviation of expected returns, A, for Stock A (B = 21.42%.) Do not round intermediate calculations. Round your answer to two decimal places. %

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