PMF, Inc., can deduct interest expenses next year up to 30% of EBIT. This limit is equally likely to be $5 million, $10 million, or $15 million. Its corporate tax rate is 38%, and investors pay a 25% tax rate on income from equity and a 35% tax rate on interest income. a. What is the effective tax advantage of debt if PMF has interest expenses of $4 million this coming year? b. What is the effective tax advantage of debt for interest expenses in excess of $15 million? (Ignore carryforwards). c. What is the expected effective tax advantage of debt for interest expenses between $5 million and $10 million? (Ignore carryforwards). d. What level of interest expense provides PMF with the greatest tax benefit