The market and Stock J have the following probability distributions: Probability M rj 0.3 15% 21% 0.4 10 6 0.3 19 13 a. Calculate the expected rates of return for the market and Stock J. Round your answers to one decimal place. Expected rate of return (Market): % Expected rate of return (Stock J): % b. Calculate the standard deviations for the market and Stock J. Do not round intermediate calculations. Round your answers to two decimal places. Standard deviation (Market): % Standard deviation (Stock J): %