Is the first one right? I also need help on the other two

A firm can issue a 15-year, $1,000 par value bond with a 10% coupon rate, paying interest semiannually, at price of $862.35. Their marginal tax rate is 40%. A dividend of $1.25 was just paid on the firm's common stock, and the firm's estimated growth rate is 8%. It can issue new common stock at $25.00 1.2. with a 20% flotation cost. The Risk-free Return is 6%, the Market Return is 12%, and the firm's beta is 1. Calculate the firm's Cost of Debt, after-tax. 15yr bond N: 30 a (I-0.4) price oa. 35 PY--802.35 par 1ooo PMT 50 (.10l000 10o/a) f V: 10006 2. Calculate the firm's Cost of Retained Earnings using the CAPM. 3. Calculate the firm's Cost of new Common Stock