A and B and please explain as well

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 $ 798 Other assets 2,429 Total assets $3,227 Current liabilities $ 593 Long-term liabilities 1,611 Stockholders' equity 1,023 Total liabilities and stockholders' equity $3,227 2019 $1,031 1,936 $2,967 $ 846 1,079 1,042 $2.967 2018 $ 893 1,735 $2,628 $ 748 946 934 $2,628 ces 2019 WIPER INC. Selected Income Statement and Other Data For the year Ended December 31, 2020 and 2019 in millions) 2020 Income statement datai Sales $3,066 Operating income 312 Interest expense 100 Net income 239 Other data Average number of common shares outstanding 42.9 Total dividends paid $ 66.0 $2,929 326 81 234 48.3 $ 53.9 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 Red and B Regc Reg D Reg E to H Req1 Reg) a. Calculate return on investment, based on net income and average total assets, for 2020 and 2019. (Do not round intermediate calculations. Round your answers to 1 decimal place.) b. Calculate return on equity for 2020 and 2019. (Round your answers to 1 decimal place.) a Return on investment b. Return on equity 2020 77% 23.4% 2019 8.4% 2251%