Before-tax cost of debt and after-tax cost of debt Personal Finance Problem David Abbot is interested in purchasing a bond issued by Sony. He has obtained the following information on the security: Answer the following questions: a. Calculate the before-tax cost of the Sony bond using the bond's yield to maturity (YTM). b. Calculate the after-tax cost of the Sony bond given the corporate tax rate. a. The before-tax cost of the Sony bond using the bond's yield to maturity (YTM) is %. (Round to two decimal places.) b. The after-tax cost of the Sony bond given the corporate tax rate is %. (Round to two decimal places.)