The Treasury bill rate is 7%, and the expected return on the market portfolio is 12%. According to the capital asset pricing model a. What is the risk premium on the market? risk premium b. What is the required return on an investment with a beta of 1.6? (Do not idind intermediate calculations. Enter your percent rounded to 1 decimal place.) r as a Return on invest C. If an investment with a beta of 0.6 offers an expected return of 8.0%, does it have a positive or negative NPV? O Positive O Negative