A firm has determined its optimal capital structure which is composed of the following sources and target market calve proportions. Debt: The firm can sell a 12-year, 31,000 par value, 7 percent bond for $960. A flotation cost of 2 percent of the face value would be required in addition to the discount of $40. Preferred Stock: The firm has determined it can issue preferred stock at S75 per share par value. The stock will pay a $I.0 annual dividend. The cost of issuing and selling the stock is $3 per share. Common Stock: A firm's common stock is currently selling for SIX per share. The dividend expected to be paid at the end of the coming year is $1.74. Its dividend payments have been growing at a constant rate for the last four years. Four years ago, the dividend was $1.50. It is expected that to sell, a new common stock issue most be underpriced SI per share in floatation costs. Additionally, the firm's marginal tax rate. is 40 percent. Calculate the following: The firm's before-tax cost of debt The firm's after-tax cost of debt The firm's cost of preferred stock The firm's cost of a new issue of common stock The firm's cost of retained earnings The weighted average cost of capital