Need some help finding out the risk free rate for this problem

Stock Y has a beta of 1.50 and an expected return of 17.5 percent. Stock Z has a beta of.95 and an expected return of 13.0 percent. What would the risk-free rate have to be for the two stocks to be correctly priced relative to each other? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) Risk-free rate