Assume that you manage a risky portfolio with an expected rate of return of 12% and a standard deviation of 47% The T-bill rate is 4% A client prefers to invest in your portfolio a proportion (y) that maximizes the expected ret on the overall portfolio subject to the constraint that the overall portfolios standard deviation will not exceed 35%. What is the investment proportion, y? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Investment proportion y % What is the expected rate of return on the overall portfolio? (Do not round intermediate calculations. Round your answer to 2 decimal places.) Rate of return %