Carla Vista Inc. is publicly traded and uses a calendar year for financial reporting. The company is authorized to issue 50 million common shares. At no time has Carla Vista issued any potentially dilutive securities. The following is a summary of Carla Vista's common share activities: 6,640.000 332,000 Number of common shares issued and outstanding at December 31, 2018 Shares issued as a result of a 5% stock dividend on September 30, 2019 Shares issued for cash on March 31, 2020 Number of common shares issued and outstanding at December 31, 2020 2,960,000 9,932,000 Carla Vista issued its 2020 financial statements on February 28, 2021. A 2-for-1 stock split of Carla Vista's common shares occurred on March 31, 2021. Calculate the weighted average number of common shares to use in calculating earnings per common share for 2019 on the 2019 comparative income statement 5229000 Weighted average number of common shares shares Calculate the weighted average number of common shares to use in calculating earnings per common share for 2019 on the 2020 comparative income statement Weighted average number of common shares shares eTextbook and Media Calculate the weighted average number of common shares to use in calculating earnings per common share for 2020 on the 2020 comparative income statement shares Weighted average number of common shares eTextbook and Media Calculate the weighted average number of common shares to use in calculating earnings per common share for 2020 on the 2021 comparative income statement Weighted average number of common shares shares