27. CAPM. The Treasury bill rate is 4%, and the expected return on the market portfolio is 12%. According to the capital asset pricing model: (LO122) a. What is the risk premium on the market? b. What is the required return on an investment with a beta of 1.5 ? c. If an investment with a beta of .8 offers an expected return of 9.8%, does it have a positive NPV? d. If the market expects a return of 11.2% from stock X, what is its beta