Suppose that you currently have $250,000 invested in a portfolio with an expected return of 12% and a volatility of 10%. The efficient (tangent) portfolio has an expected return of 17% and a volatility of 12%. The risk-free rate of interest is 5%. Suppose that you want to maximize your expected return without increasing your risk. Accordingly, the maximum expected return you can expect in this case is: 10% 13% 15% 21% None of the above