Presented here are summarized data from the balance sheets and income statements of Wiper Inc.: WIPER INC. Condensed Balance Sheets December 31, 2020, 2019, 2018 (in millions) 2020 Current assets $ 764 Other assets 2,424 Total assets $3,188 Current liabilities $ 588 Long-term liabilities 1,582 Stockholders' equity 1,018 Total liabilities and stockholders' equity $3,188 2019 $ 981 1,931 $2,912 $ 841 1,034 1,037 $2,912 2018 $ 843 1,730 $2,573 $ 734 910 929 $2,573 WIPER INC. Selected Income Statement and Other Data For the year Ended December 31, 2020 and 2019 (in millions) 2020 Income statement data: Sales $3,061 Operating income 307 Interest expense 95 Net income Other datat 224 Average number of common shares outstanding 42.4 Total dividends paid $ 61.0 2019 $2,924 321 76 219 47.8 $53.4 Required: Required: a. Calculate return on investment, based on net income and average total assets, for 2020 and 2019. b. Calculate return on equity for 2020 and 2019. c. Calculate working capital and the current ratio for each of the past three years. d. Calculate earnings per share for 2020 and 2019. e. If Wiper's stock had a price/earnings ratio of 12 at the end of 2020, what was the market price of the stock? f. Calculate the cash dividend per share for 2020 and the dividend yield based on the market price calculated in parte g. Calculate the dividend payout ratio for 2020, h. Assume that accounts receivable at December 31, 2020, totaled $320 million Calculate the number of days' sales in receivables that date. 1. Calculate Wiper's debt ratio and debt/equity ratio at December 31, 2020 and 2019, J. Calculate the times interest earned ratio for 2020 and 2019