Before-tax cost of debt and after-tax cost of debtPersonal Finance ProblemDavid Abbot is interested in purchasing a bond issued by Sony. He has obtained the following information on the security: Sony Bond Par value $1000 Coupon interest rate 8.0% Corporate tax rate 25% Cost$900 Years to maturity 10 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.