Need help with these 3 steps

Selected current year-end financial statements of Cabot Corporation follow. (All sales were on credit; selected balance sheet amounts at December 31 of the prior year were inventory, $48,900; total assets, $189,400; common stock, $90,000; and retained earnings, $33,748. Compute the times interest earned. Compute the days' sales in inventory. Compute the debt-to-equity ratio