Compute ROE for all three years reported on the income statement. (Hint: Do your companies report non0controlling interest on the income statement and balance sheet? To compute ROE for three years, determine the average stockholders' equity for three years, which means there is a need for four balance sheet amounts.

12 Months Ended Dec 31, 2019 Dec. 31, 2020 Dec. 31, 2018 $ 41,908 $ 41,172 $ 40,825 Consolidated Statements of Income - USD ($) shares in Millions, $ in Millions Income Statement(Abstract) Revenues [1] Costs and expenses: Cost of sales (2) Selling, informational and administrative expenses (2) Research and development expenses (2) Amortization of intangible assets Restructuring charges and certain acquisition-related costs (Gain) on completion of Consumer Healthcare JV transaction Other (income)/deductions--net Income from continuing operations before provision/(benefit) for taxes on income (31.[4] Provision/(benefit) for taxes on income Income from continuing operations Income from discontinued operations--net of tax Net income before allocation to noncontrolling interests Less: Net income attributable to noncontrolling interests Net income attributable to Pfizer Inc. common shareholders Earnings per common share-basic: Income from continuing operations attributable to Pfizer Inc. common shareholders (in dollars per share) Income from discontinued operations--net of tax (in dollars per share) Net income attributable to Pfizer Inc.common shareholders (in dollars per share) ) Earnings per common share-diluted: Income from continuing operations attributable to Pfizer Inc.common shareholders (in dollars per share) Income from discontinued operations--net of tax (in dollars per share) Net income attributable to Pfizer Inc. common shareholders (in dollars per share) Weighted average shares-basic Weighted average shares-diluted 8,692 11,615 9,405 3,436 600 (6) 669 7,497 477 7,021 2,631 9,652 36 $ 9,616 8,251 12,750 8,394 4,462 601 (8,086) 3,314 11,485 618 10,867 5,435 16,302 29 $ 16,273 8,987 12,612 7,760 4,736 1,058 0 2,077 3,594 (266) 3,861 7,328 11,188 36 $ 11,153 $ 1.26 $ 1.95 $ 0.65 0.47 1.73 0.98 2.92 1.25 1.90 1.24 1.91 0.64 0.47 $ 1.71 5,555 5,632 0.96 $ 2.87 5,569 5,675 1.23 $ 1.87 5,872 5,977 [1] ] (2) [ ( [3] (4) On November 16, 2020, we completed the spin-off and the combination of our Upjohn Business with Mylan to form Viatris. On December Exclusive of amortization of intangible assets, except as disclosed in Note 1L. 2019 v. 2018 - The domestic income in 2019 versus domestic loss in 2018 was mainly related to the completion of the Consumer 2020 v. 2019-The domestic loss in 2020 versus domestic income in 2019 was mainly related to the non-recurrence of the gain on the