Intro Lumber Corp's common stock trades at a price of $40 per share. The most recent dividend was $1.6 per share and it is expected to grow by 5% per year. Flotation costs for common stock have been estimated at 6%, while bonds and preferred stock are sold in private placements and have negligible flotation costs. The company's preferred stock is selling at $50 and has an annual dividend of $4. Lumber Corp. has bonds outstanding with an average coupon rate of 12% and a yield to maturity of 9% The firm's optimum capital structure is 45% equity, 15% preferred stock and 40% debt, and its tax rate is 40%. IB Attempt 1/6 for 10 pts. Part 1 What is the after-tax) cost of debt? 3+ decimals Submit Part 2 What is the cost of preferred stock? Attempt 1/6 for 10 pts. 3+ decimals Submit IB Attempt 1/6 for 10 pts. Part 3 What is the cost of retained earnings? 3+ decimals Submit . Attempt 1/6 for 10 pts. Part 4 What is the cost of new common stock? 3+ decimals Submit IB Attempt 1/6 for 10 pts. Part 5 What is the weighted average cost of capital, assuming the company doesn't have to issue any new common stock? 3+ decimals Submit