Here are book- and market-value balance sheets of the United Frypan Company:

Book-Value Balance Sheet
Net working capital	$	30	Debt	$	50
Long-term assets		70	Equity		50
	$	100		$	100

Market-Value Balance Sheet
Net working capital	$	30	Debt	$	50
Long-term assets		160	Equity		140
	$	190		$	190

Assume that MMs theory holds except for taxes. There is no growth, and the $50 of debt is expected to be permanent. Assume a 31% corporate tax rate.

a. How much of the firm's market value is accounted for by the debt-generated tax shield?

b. What is United Frypans after-tax WACC if r_Debt = 7.8% and r_Equity = 15.2%? (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 7.8%. (Do not round intermediate calculations. Round your answer to 2 decimal places.)