please help answer the following two

Viserion, Inc., is trying to determine its cost of debt. The firm has a debt issue outstanding with 23 years to maturity that is quoted at 93 percent of face value. The issue makes semiannual payments and has an embedded cost of 7 percent annually. a. What is the company's pretax cost of debt? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) b. If the tax rate is 22 percent, what is the aftertax cost of debt? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) a. Pretax cost of debt b. Aftertax cost of debt % 5% Lannister Manufacturing has a target debt-equity ratio of .55. Its cost of equity is 10 percent, and its cost of debt is 6 percent. If the tax rate is 24 percent, what is the company's WACC? (Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16.) WACC %