help!

Mikkelson Corporation's stock had a required return of 12.22% last year, when the risk-free rate was 2.52% and the market risk premium was 8.51%. Then an increase in investor risk aversion caused the market risk premium to rise by 2%. The risk-free rate and the firm's beta remain unchanged. What is the company's new required rate of return? (Hint: First calculate the beta, then find the required return.) Your