Can I get some help in solving this problem please?

Booher Book Stores has a beta of 1.0. The yield on a 3-month T-bill is 4.5% and the yield on a 10-year T-bond is 7%. The market risk premium is 6%, and the return on an average stock in the market last year was 13%. What is the estimated cost of common equity using the CAPM? Round your answer to two decimal places.