delta common stock just paid out a dividend of $2.18 for the year. deltas dividends per share are expected to increase at 5% for the foreseeable future. deltas common stock trades at $30 today. the firms marginal tax rate is 25%. based on this information, the firms marginal cost of common equity is estimated to be:

12.98%

12.63%

13.33%

13.68%

13.82%