please help! i cant figure it out and ive posted this question multiple times and the expert has gotten it wrong.

The market and Stock ) have the following probability distributions: Probability 0.3 ) 15% 19% 0,4 0.3 10 18 6 13 a. Calculate the expected rate of return for the market. Round your answer to two decimal places. % Calculate the expected rate of return for Stock ). Round your answer to two decimal places. % b. Calculate the standard deviation for the market. Do not round intermediate calculations. Round your answer to two decimal places. % Calculate the standard deviation for Stock J. Do not round Intermediate calculations. Round your answer to two decimal places