The Tyler Oil Company's capital structure is as follows: Debt Preferred stock Common equity 20% 15 The aftertax cost of debt is 9 percent, the cost of preferred stock is 12 percent, and the cost of common equity in the form of retained earnings) is 15 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 (K) Weighted average cost of capital (N) 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 60% 5 Debt Preferred stock Common equity 60K 5 Under this new and more debi-oriented arrangement, the aftertax cost of debt is 110 percent, the cost of preferred stock is 14 percent and the cost of common equity in the form of retained earnings) is 175 percent 1-2. Calculate Tyler's weighted average cost of capital (Round the final answers to 2 decimal places.) Melted cost Debt (KL) Preferred stock (p) Common equity (K) Weighted average cost of capital (ka) b. Which plan is optimal in terms of minimizing the weighted average cost of capital? O Plan 1 Plan 2