4. Suppose that there are two independent economic factors, F, and F2. The risk-free rate is 6%, and all stocks have independent firm-specific components with a standard deviation of 45%. Portfolios A and B are both well-diversified with the following properties: Portfolio Beta on F1 Beta on F2 Expected Return B 1.5 2.2 2.0 -0.2 31% 27% What is the expected return-beta relationship in this economy