The Treasury bill rate is 4%, and the expected return on the market portfolio is 12%. Use the capital asset pricing model. b. What is the risk premium on the market? c. What is the required return on an investment with a beta of 1.5? d. If an investment with a beta of 0.8 offers an expected return of 9.8%, does it have a positive NPV? e. If the market expects a return of 11.2% from stock X, what is its beta? (Round your answer to 1 decimal place.)