Omega has 10 million shares outstanding, now trading at $55 per share. The firm has estimated the expected rate of return to shareholders at about 12%. It has also issued long-term bonds of $200 million at an interest rate of 7%. It pays tax at a marginal rate of 35%. a. What is Omegas after-tax WACC? b. How much higher would WACC be if Omega used no debt at all? (Use both approaches!)