You have the following information about two firms, Debt Free, Incorporated and Debt Spree, Incorporated. Both firms have the same prospects for sales and EBIT, and both have the same level of assets, tax rate and borrowing rate. They differ in their use of debt financing. Required: a. Calculate the interest expense for each firm: Required: a. Calculate the interest expense for each firm: b. Calculate the following items for each firm for each scenario (bad year, normal year, good year): return on assets (ROA), net profit, and return on equity (ROE). (Use a minus sign to indicate negatlve answers. Round your answers to 2 decimal places.)