Here are book- and market-value balance sheets of the United Frypan Company (figures in $ millions):

Book-Value Balance Sheet

net working capital $25 Debt $45

Long term assets 75 Equity 77

Total $100 $100

Market value balance sheet

Net working capital $25 Debt $45

Long term assets 150 Debt 130

Total $175 $175

Assume that MM's theory holds except for taxes. There is no growth, and the $45 of debt is expected to be permanent. Assume a 21% corporate tax rate.

a. How much of the firm's market value is accounted for by the debt-generated tax shield?(Enter your answer in million rounded to 2 decimal places.)

b. What is United Frypan's after-tax WACC if r_Debt = 7.9% and r_Equity = 15.1%? (Do not round intermediate calculations. Enter your answer as a percent rounded to 2 decimal places.)

c. Now suppose that Congress passes a law that eliminates the deductibility of interest for tax purposes after a grace period of 5 years. What will be the new value of the firm, other things equal? Assume a borrowing rate of 7.9%. (Do not round intermediate calculations. Enter your answer in million rounded to 2 decimal places.)