Concord Corporation, has 4210000 shares of common stock outstanding on December 31, 2020. An additional 807000 shares of common stock were issued on April 1, 2021, and 395000 more on July 1, 2021. On October 1, 2021, Concord issued 19900, $1,000 face value, 8% convertible bonds. Each bond is convertible into 20 shares of common stock. No bonds were converted into common stock in 2021. What is the number of shares to be used in computing basic earnings per share and diluted earnings per share, respectively? 0 5412250 and 6212250 5012750 and 5012750 5012750 and 5112250 0 5012750 and 5412250