Stocks A and B have the following probability distributions of expected future returns: Probability A B 0.1 (8 %) (35 %) 0.2 4 0 0.4 13 21 0.2 19 28 0.1 38 43 Calculate the expected rate of return, , for Stock B ( = 12.80%.) Do not round intermediate calculations. Round your answer to two decimal places. % Calculate the standard deviation of expected returns, A, for Stock A (B = 20.53%.) Do not round intermediate calculations. Round your answer to