ABC Inc. borrows money at 10%, sells bonds at 5%, and the purchasers of common stock require 10% rate of return. If the company has borrowed $40 million, sold $60 million in bonds, and sold $100 million worth of common stocks, what is the Weighted Average Cost of Capital (WACC)?

and

If the same company from the previous question used 7% ROR for loans, 8% ROR for bonds, and 13% ROR for stocks, and also used a 50% tax rate, what is the WACC?