The Treasury bill rate is 7 percent and the expected return on the market portfolio is 15 percent. (a) What is the risk premium on the market? (b) What is the required rate of return n an investment with a beta of 1.25 ? (c) If the market expects a return of 11 percent from XTC Leisure Inc., what is its beta? (d) If an investment with a beta of 1.5 offers an expected return of 20 percent, does it have a positive NPV