n the icon here o in order to copy the contents of the data table bela -preadsheet.) Source of capital Long-term debt Preferred stock Common stock equity Total Weight 30 % 25 45 100% a. Calculate the after-tax cost of debt. b. Calculate the cost of preferred stock. c. Calculate the cost of common stock. a. The after-tax cost of debt using the approximation formula is %. (Round to two decimal places.) The after-tax cost of debt using the bond's yield to maturity (YTM) is %. (Round to two decimal places.) b. The cost of preferred stock is %. (Round to two decimal places.) C. The cost of retained earnings is %. (Round to two decimal places.) The cost of new common stock is %. (Round to two decimal places ) d. Using the cost of retained earnings, the firm's WACC is % (Round to two decimal places.) Using the cost of new common stock, the firm's WACC is % (Round to two decimal places.)