help me please.

1. The following figure shows plots of monthly rates of return and the stock market for two stocks. A-PF B- TM-Ft (a) Which stock is riskier to an investor currently holding a diversified portfolio of common stock? (b) Which stock is riskier to an undiversified investor who puts all of his funds in only one of these stocks? 2. Which of the following statements about the security market line (SML) are true? (a) The SML provides a benchmark for evaluating expected investment performance. (b) The SML leads all investors to invest in the same portfolio of risky assets. (c) The SML is a graphic representation of the relationship between expected return and beta. (d) Properly valued assets plot exactly on the SML