Excel Online Structured Activity: WACC and optimal capital budget Adamson Corporation is considering four average-risk projects with the following costs and rates of return: the spreadsheet and perform the required analysis to answer the questions below. Open spreadsheet a. What is the cost of each of the capital components? Round your answers to two decimal places. Do not round your intermediate calculats. Cost of debt Cost of preferred stock Cost of retained earnings b. What is Adamson's WACC? Round your answer to two decimal places. Do not round your intermediate calculations. 1/ c. Only projects with expected returns that exceed WACC will be accepted. Which projects should Adamson accept