The Tyler Oil Company's capital structure is as follows: Debt Preferred stock Common equity The aftertax cost of debt is 7 percent; the cost of preferred stock is 10 percent; and the cost of common equity (in the form of retained earnings) is 13 percent. 0-1. Calculate Tyler Oil Company's weighted average cost of capital. (Round the final answers to 2 decimal places.) Weighted Cost Debt (d) Preferred stock (p) Common equity (ke) Weighted average cost of capital (ka) As an alternative to the capital structure shown above for Tyler Oil Company's, an outside consultant has suggested the following modifications. Debt Preferred stock Common equity As an alternative to the capital structure shown above for Tyler Oil Company's, an outside consultant has suggested the following modifications. Debt Preferred stock Common equity Under this new and more debt-oriented arrangement, the aftertax cost of debt is 9.0 percent, the cost of preferred stock is 12 percent, and the cost of common equity (in the form of retained earnings) is 15.5 percent. 0-2. Calculate Tyler's weighted average cost of capital. (Round the final answers to 2 decimal places.) Weighted Cost Debt (kd) Preferred stock (Kp) Common equity (ke) Weighted average cost of capital (ka) b. Which plan is optimal in terms of minimizing the weighted average cost of capital? Plan 1 Plan 2