The future earnings, dividends, and common stock price of Callahan Technologies Inc. are expected to grow 4% per year. Callahan's common stock currently sells for $25.50 per share; its last dividend was $2.50; and it will pay a $2.60 divided at the end of the current year. a. Using the DOF approach, what per is its cost of common equity? Round your answer two decimal places. Do not round your calculations. % b. If the firm's beta is 1.50, the risk-free rate is 8%, and the average return on the market is 14%, what will the firm's cost of common equity using the CAPM approach? % c. If the firm's bonds ear a return of 12%, based on the bond yield-plus-risk-premium approach, what will be r? Use the midpoint of the risk premium range discussed in Section 10-5 in year calculations. % d. If you have equal confidence in the inputs used for the three approaches, what you estimate of callahan's cost of common equity? Do not round your intermediate calculations %