A stock has an expected return of 10 percent, the risk-free rate is 4.5 percent, and the market risk premium is 6 percent. The beta of this stock must be

A stock has an expected return of 12 percent, its beta is 0.55, and the risk-free rate is 7.2 percent. The expected return on the market must be_______ percent.

A stock has an expected return of 15.63 percent, its beta is 1.25, and the expected return on the market is 13 percent. The risk-free rate must be______ percent.