Please use excel to solve it and solve second part.

Your answer is correct. What is the current YTM of the bonds? (Round intermediate calculations to 4 decimal places, e.g. 1.2514 and final answer to 0 decimal places, e.g. 15\%.) Current YTM for the bonds % eTextbook and Media Attempts: 4 of 10 used Problem 13.17 a1-a2(a2) What is the after-tax cost of debt for this firm if it is subject to 30 percent marginal and average tax rates? (Round final answer to 2 decimal places, e.g. 15.25\%.) After-tax cost of debt %