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% 29% 40% Your client decides to invest in your risky portfolio a proportion (v) 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%. What is the standard deviation of the rate of return on your client's portfolio? (Do NOT enter % sign. If your answer is 0.0678 or 6.78% enter only 6.78. Round your answer to 2 decimal places.)