Metlock Inc. uses a calendar year for financial reporting. The company is authorized to issue 9,510,000 shares of $10 par common stock. At no time has Metlock issued any potentially dilutive securities. Listed below is a summary of Metlock's common stock activities 1 2,060,000 2. 206,000 3. Number of common shares issued and outstanding at December 31, 2018 Shares issued as a result of a 10% 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 A 2-for-1 stock split of Metlock's common stock took place on March 31, 2021 1,890,000 4,156,000 4. (a) Compute the weighted-average number of common shares used in computing earnings per common share for 2019 on the 2020