Stock Z has a beta of 2 and an expected return of 10%. If Treasury Bills currently return 1% and the expected return on the S&P 500 is 7%, is this stock correctly priced, underpriced, or overpriced?...

Stock Z has a beta of 2 and an expected return of 10%. If Treasury Bills currently return 1% and the expected return on the S&P 500 is 7%, is this stock correctly priced, underpriced, or overpriced? Graph the security market line and Stock Z. Label all relevant details. What does beta represent? Explain the concept of market efficiency using your graph