which one is correct answer please confirm? Q 12: Wellington Gas has a target capital structure of 50% common equity, 40% debt, and 10% preferred stock. The cost of retained earnings is 16%, and the...

Q 12: Wellington Gas has a target capital structure of 50% common equity, 40% debt, and 10% preferred stock. The cost of retained earnings is 16%, and the cost of new equity (external) is 16.7%. Wellington can sell debentures that will have an after-tax cost of 8.3% and the after-tax cost of preferred stock will be 11.9%. What is the marginal cost of capital before and after the break point?