MC has 750 million shares trading at $58 per share and $71 billion in debt outstanding (with a market value of $67 billion), on which it incurred an interest expense of $6 billion in the most recent year. It also has $4 billion in preferred stock outstanding, trading at par, on which it paid a dividend of $370 million. The stock has a beta of 1.15 and is rated A (which commands a spread of 1.25% over the treasury bond rate of 6.25%). The company faced a corporate tax rate of 40%. A. What is the cost of equity for MC? B. What is the after-tax cost of debt for MC? C. What is the cost of preferred stock? D. What is the cost of capital