On january 1, 2020, whispering corporation issued $3,740,000 of 10-year, 8% convertible debentures at 102. interest is to be paid semiannually on june 30 and december 31. each $1,000 debenture can be converted into 8 shares of whispering corporation $100 par value common stock after december 31, 2021. on january 1, 2022, $374,000 of debentures are converted into common stock, which is then selling at $111. an additional $374,000 of debentures are converted on march 31, 2022. the market price of the common stock is then $116. accrued interest at march 31 will be paid on the next interest date. bond premium is amortized on a straight-line basis. make the necessary journal entries for: (a) december 31, 2021. (c) march 31, 2022. (b) january 1, 2022. (d) june 30, 2022.