Assume that you manage a risky portfolio with an expected rate of return of 14% and a standard deviation of 38%. The T-bill rate is 4%. A client prefers to invest in your portfolio a proportion ( y ) that maximizes the expected return on the overall portfollo subject to the constraint that the overall portfolio's standard devlation will not exceed 25%. Required: o. What is the investment proportion, y ? (Do not round intermediate calculations. Round your answer to 2 decimal places.) b. What is the expected rate of return on the overall portfollo? (Do not round intermediate calculations. Round your answer to 2 decimal places.)