The market portfolio has an expected return of 12.5 percent and a standard deviation of 22.5 percent. The risk-free rate is 5.5 percent. a. What is the expected return on a well-diversified portfolio with a standard deviation of 9.5 percent? (Do not round intermediate colculations and enter your onswer as a percent rounded to 2 decimal places, e.g., 32.16.) b. What is the standard deviation of a well-diversified portfolio with an expected return of 20.5 percent? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16)