Problem-8-54 Beta-and-Required "Rate of Return: 'A'stock has a required return of 11%, the risk-free-rate-is- 7%, and the market risk premium-is-4%.1 a. What is the stock's beta? b. If the market risk premium-increased to 6%, what would happen to the stocks required rate of return? Assume that the risk-free rate and the beta remain unchanged