Assume that you manage a risky portfolio with an expected rate of return of 17% and a standard deviation of 27%. The T-bill rate is 7%. Your risky portfolio includes the following investments in the given proportions: Stock A Stock B Stock C 27% 33% 40% Your client decides to invest in your risky portfolio a proportion (y) 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 15%. a. What is the proportion y? (Round your answer to 1 decimal place.) Proportion y 80 b. What are your client's investment proportions in your three stocks and the T-bill fund? (Round your answers to 1 decimal place.) Investment Security Proportions T-Bills 20 % Stock A 21.6 % Stock B 26.4 % Stock C 32 % c. What is the standard deviation of the rate of return on your client's portfolio? (Round your answer to 1 decimal place.) Standard deviation % per year