please help me with question C,D, and E.

Question 2: You are given the following information for Watson Power Co. Assume the company's tax rate is 34 percent. Debt: 6,0007.9 percent coupon bonds outstanding, $1,000 par value, 25 years to maturity, selling for 108 percent of par; the bonds make semiannual payments. Common stock: 510,000 shares outstanding, currently selling for $69 per share; the next dividend will be $5.52 per share; and the capital gain yield is 10%. Preferred stock: 29,000 shares of 6% dividends preferred stock outstanding, currently selling for $80 per share. (Note: The par value of the preferred stock is assumed to be $100 per share. So, 6% dividends preferred stock means the preferred dividends is 6% of $100=$6.00 ) a. What is the cost of common equity? b. What is the cost of preferred equity? c. What is the before-tax cost of debt? After-tax cost of debt? d. What are the weights for the three types of capital