Stock Y has a beta of .9 and an expected return of 11.2 percent. Stock Z has a beta of 0.5 and an expected return of 7.2 percent. If the risk-free rate is 5.0 percent and the market risk premium is 6.0 percent, the reward-to-risk ratios for stocks Y and Z are 6.89 and 4.40 percent, respectively.

Since the SML reward-to-risk is What ????

What is the Reward-to-risk percent?