Here are simplified financial statements for phone corporation in a recent year:

income statement (figures in $ millions) net sales $ 13,900 cost of goods sold 4,460 other expenses 4,197 depreciation 2,758 earnings before interest and taxes (ebit) $ 2,485 interest expense 725 income before tax $ 1,760 taxes (at 30%) 528 net income $ 1,232 dividends $ 936

balance sheet (figures in $ millions) end of year start of year assets cash and marketable securities $ 97 $ 166 receivables 2,782 2,650 inventories 227 278 other current assets 907 972 total current assets $ 4,013 $ 4,066 net property, plant, and equipment 20,053 19,995 other long-term assets 4,296 3,850 total assets $ 28,362 $ 27,911 liabilities and shareholders’ equity payables $ 2,644 $ 3,120 short-term debt 1,459 1,613 other current liabilities 851 827 total current liabilities $ 4,954 $ 5,560 long-term debt and leases 5,026 5,401 other long-term liabilities 6,258 6,229 shareholders’ equity 12,124 10,721 total liabilities and shareholders’ equity $ 28,362 $ 27,911

calculate the following financial ratios for phone corporation: (use 365 days in a year. do not round intermediate calculations. round your percentage answers "return on equity", "return on assets", return on capital" and "operating profit margin" to 2 decimal places and the rest to 2 decimal places.)

b. return on assets (use after-tax operating income and average assets.) %

c. return on capital (use after-tax operating income and average capital.)

g. operating profit margin (use after-tax operating income.)