Booher Book Stores has a beta of 0.6. The yield on a 3-month T-bill is 5% and the yield on a 10 -year T-bond is 6%. The market risk premium is 5.5%, and the return on an average stock in the market last year was 15%. What is the estimated cost of common equity using the CAPM? Round your answer to two decimal places. % Booher Book Stores has a beta of 0.6. The yield on a 3-month T-bill is 5% and the yield on a 10 -year T-bond is 6%. The market risk premium is 5.5%, and the return on an average stock in the market last year was 15%. What is the estimated cost of common equity using the CAPM? Round your answer to two decimal places. %