You manage a risky portfolio with an expected rate of return of 21% and a standard deviation of 35%. The T-bill rate is 5%. Your risky portfolio includes the following investments in the given proportions: Suppose that your client decides to invest in your portfolio a proportion y of the total investment budget so that the overall portfolio will have an expected rate of return of 17%. a. What is the proportion y ? (Round your answer td the nearest whole number.) b. What are your client's investment proportions in your three stocks and the T-bill fund? (Do not round intermediate calculations. Round your answers to 2 decimal places.) c. What is the standard deviation of the rate of return on your client's portfolio? (Do not round intermediate calculations. Round your answer to 2 decimal places.)