i need 20, it uses info from 19 thank you

19. Your client has debt/assets of 60%, pays interest of 6% on their debt, has pretax income of $5,000,000, net income after taxes of $3,500,000, total assets of $10,000,000 and a cost of equity of 15%. (A) what is this company's tax rate ? (B) What is this company's return on equity? Please label your answers A&B. 20. Regarding the Company is question #19 (above) (A) what is this company's aftertax cost of debt? (B) What is this company's weighted average cost of capital? Please label your answers A&B