Exercise 4.10 According to the CAPM, every investor owns a combination of the market portfolio and a riskless asset. The standard deviation of the market portfolio is 30% and its expected return is 15%. The riskless return has a return of 5%. How should the following investors divide their investment between the market portfolio and the riskless asset if: They desire a portfolio with zero standard deviation They desire a portfolio with a standard deviation of 15% They desire a portfolio with a standard deviation of 30% They desire a portfolio with a standard deviation of 45%