Can someone help me determine the correct responses to this 2 part question?

Assume that you manage a risky portfolio with an expected rate of return of 16% and a standard deviation of 45%. The T-bill rate is 6%. 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 14%. a. What is the proportion y? (Enter your answer as a decimal number rounded to 2 decimal places.) Proportion y b. What is the standard deviation of the rate of return on your client's portfolio? (Enter your answer as a percentage rounded to two decimal places.) Standard deviation % per year