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/eamings ratio of 14 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 part e g. Calculate the dividend payout ratio for 2020 , h. Assume that accounts receivable at December 31, 2020, totaled $310 million. Calculate the nurhber of days' sales in recelvables at that date. i. Calculate Wiper's debt ratio and debt/equity ratio at December 31, 2020 and 2019. 1. Calculate the times interest eatned ratio for 2020 and 2019