6. Calculate the after tax cost of new debt (like a mortgage bond) if the corporate income tax rate is 21%, the coupon rate is 6% and the yield to maturity of the bond is 8%. 7. Calculate the cost in percentage terms of preferred stock to a company whose price is $50/share and pays a dividend of $3.80. 8. List the names of three ways financial analysts "estimate the cost of common equity. 9. The weighted cost of capital refers to the cost of financing a new investment project. If the firm doesn't finance with preferred stock, what weight would you assign to the cost of preferred stock? 10. Which is the cheapest form of financing? Which is the most expensive form of financing for a corporation? Why don't corporations use only the cheapest form? Under what circumstances would a corporation use the most expensive form? 11. Please answer Problem 10-5 in the back of the chapter. It's about WACC vs. IRR