Please try and give me a step by step on how to get the answer, I've already tried to use numerous different similar questions to figure out the answer for this and all the different equations i've tried have been incorrect.

Problem 11-10 Approximate yield to maturity and cost of debt (LO11-3] Russell Container Corporation has a $1,000 par value bond outstanding with 20 years to maturity. The bond carries an annual interest payment of $130 and is currently selling for $800 per bond. Russell Corp. is in a 25 percent tax bracket. The firm wishes to know what the aftertax cost of a new bond issue is likely to be. The yield to maturity on the new issue will be the same as the yield to maturity on the old issue because the risk and maturity date will be similar. a. Compute the yield to maturity on the old issue and use this as the yield for the new issue. (Do not round intermediate calculations. Input your answer as a percent rounded to 2 decimal places.) Yield on new issue b. Make the appropriate tax adjustment to determine the aftertax cost of debt. (Do not round intermediate calculations. Input your answer as a percent rounded to 2 decimal places.) Aftertax cost of debt