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

Probability	A	B
0.1	(13%)	(23%)
0.3	4	0
0.3	12	19
0.2	21	26
0.1	30	45

1. Calculate the expected rate of return, r_B, for Stock B (r_A = 10.70%.) Do not round intermediate calculations. Round your answer to two decimal places. %

2. Calculate the standard deviation of expected returns, _A, for Stock A (_B = 18.09%.) Do not round intermediate calculations. Round your answer to two decimal places. %

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

please help!Thank you!