The following table summarizes the monthly return and risk of two actively managed portfolios A and B: Summary of Portfolio Performance The T-bill (risk-free) rate is 2%. A. (2 points) Suppose that you want to expand your existing well-diversified portfolio. Which portfolio, A or B, would you prefer to choose? Briefly. explain. B. (2 points) Determine whether each portfolio is located above, exactly on, or below the security market line (SML). Briefly explain. Note: You must show your calculation steps briefly and clearly