Challenger Limited reported the following shareholders' equity data (all dollars in millions): (Click the icon to view the shareholders' equity data.) Challenger earned net income of $2,940 during 2020. Common shares were issued for $10.00 each. For each account except Retained Earnings, one transaction explains the change from the December 31, 2019 balance to the December 31, 2020 balance Two transactions affected Retained Earnings. Give a full explanation, including the dollar amount for the change in each account. Preferred Shares Challenger preferred shares of $ million Common Shares (Enter the number of shares rounded to one decimal place.) Challenger million million common shares for $ Petained Earnings of million and decreased by Vofs million Retained earnings increased by X Shareholders' equity data December 31 2020 2019 602 $ 785 Preferred shares 2.850 2,170 Common shares 20.650 19.102 Retained earnings