The financial manager has determined the following schedules for the cost of funds: 3. Determine the firm's optimal capital structure. Round your answer to two decimal places. The optimal capital structure consists of \% debt resulting in the cost of capital equal to b. Construct a simple pro forma balance sheet that shows the firm's optimal combination of debt and equity for its current level of assets. Round your answers to the nearest dollar. c. An investment costs 5500 and offers annual cash inflows of $153 for five years. Should the firm make the investment? Use Anpendix D to answer the question. Alound your answer to the nearest whole number. The investment be made since the internal rate of return that is the cost of capital. d. If the firm makes this addeional investment, how shovid its balance sheet appear? Round your answers to the nearest dollar