you manage a risky portfolio with an expected rate of return of 18% and a standard deviation of 36%. The T- Bill rate is 6%

your risky portfolio includes the following investments in the given proportions:

stock a 27%

stock b 35%

stock c 38%

suppose that your client decided 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 15%

A. what is the proportion of y?

B. What are your client's investment proportions in your three stocks and T- bill fund?

C. What is the standard deviation of the rate of return on your client's portfolio?