10. Problem 10.18 (WACC and Optimal Capital Budget) Adamson Corporation is considering four average-risk projects with the following costs and rates of return: common stock, 15% debt, and 10% preferred stock. a. What is the cost of each of the capital components? Do not round intermediate calculations. Round your answers to two decimal places. Cost of debt: % Cost of preferred stock: % Cost of retained earnings: % b. What is Adamson's WACC? Do not round intermediate calculations. Round your answer to two decimal places. % c. Only projects with expected returns that exceed WAcc will be accepted. Which projects should Adamson accept? Project 1 Praject 2 Project 3 Project 4