The treasury bill rate is 6%, and the expected return on the market portfolio is 10%. According to the capital asset pricing model:

a. what is the risk premium on the market?

b. what is the required return on an investment with a beta of 1.5? (do not round intermediate calculations. enter your answer as a percent rounded to 1 decimal place.)

c. if an investment with a beta of 0.7 offers an expected return of 8.5%, does it have a positive or negative NPV?

d. if the market expects a return of 10.08% from stock X, what is its beta? (do not round intermediate calculations. round your answer to 2 decimal places.)