Assume that you manage a risky portfolio with an expected rate of return of 12% and a standard deviation of 39%. The T-bill rate is 6% Your risky portfolio includes the following investments in the given proportions: Stock A Stock B Stock 23% 32 45 Your client decides to invest in your risky portfolio a proportion () of his total investment budget with the remainder in a T-bill money market fund so that his overall portfolio will have an expected rate of return of 9%. Required: a. What is the proportion y? (Round your answer to 1 decimal place.) Proportion y % b. What are your client's investment proportions in your three stocks and in T-bills? (Round your intermediate calculations and final answers to 2 decimal places.) Investment Proportions Security T-Bills Stock A Stock B Stock C % % % % c. What is the standard deviation of the rate of return on your client's portfolio? (Round your intermediate calculations and final answer to 1 decimal place.) Standard deviation % per year