Last year, Shea Corporation had net operating profit after taxes (NOPAT) of $2,700 million. Its EBITDA was $4,800 million and net income amounted to $2,400 million. During the year, Shea made $1,000 million in net capital expenditures (remember that net capital expenditures equal gross capital expenditures less depreciation), and its net operating working capital increased by $100 million. Finally, Shea's finance staff has concluded that the firm's total after-tax capital costs were $1,250 million (which is calculated by multiplying the company's WACC by its total invested capital), and its tax rate is 25%. Assume that the company does not have any amortization charges.

a. What is the company's depreciation expense?

b. What is the company's interest expense?

c. What is the company's free cash flow?

d. What is the company's EVA?