Please Help Me Answer 2 Question ..?

Exercise 19 Firm A has the following data: Target capital structure of 46% debt, 3% preferred, and 51% common equity; Tax rate = 40%; rd = 7%; rp = 7.5%; rs = 11.5%; and re = 12.5%. What is the firm's WACC if it does not issue any new stock? EXERCISE 20 Midwest Electric Company (MEC) uses only debt and common equity. It can borrow unlimited amounts at an interest rate of 10% as long as it finances at its target capital structure, which calls for 45% debt and 55% common equity. Its last dividend was $2, its expected constant growth rate is 4%, and its common stock sells for $20. MEC's tax rate is 40%. What is the WACC of MEC