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

a$.$ Calculate the expected rate of return, hat$(r{)}_B,$ for Stock $.)$ Do not round intermediate calculations. Round your answer to two decimal places.

$\%$

b$.$ Calculate the standard deviation of expected returns, ${}_A,$ for Stock $.)$ Do not round intermediate calculations. Round your answer to two

decimal places.

$\%$

Now calculate the coefficient of variation for Stock B$.$ Do not round intermediate calculations. Round your answer to two decimal places. Please Help