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

Probability	A	B
0.1	(10%)	(23%)
0.2	2	0
0.3	15	24
0.3	18	30
0.1	35	43

A. Calculate the expected rate of return, rB, for Stock B (rA = 12.80%.) Do not round intermediate calculations. Round your answer to two decimal places.

B. Calculate the standard deviation of expected returns, ?A, for Stock A (?B = 18.69%.) Do not round intermediate calculations. Round your answer to two decimal places.

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