$6,000,0004% Bonds issued @104 on 1/1/17. Interest is paid every six months 6/30&12/31. Premium is amortized on a straight-line basis. After 2 years from the date of issue, the bonds can be converted into Common Stock as follows: For every $1,000 in bonds, the bond holder can convert the bond into 8 shares of common stock. On 1/1/19$600,000 of bonds are converted: $600,000/$1,000=6008=4,800 shares. On 3/31/19 an additional $600,000 of bonds are converted: $600,000/$1,000=6008= 4,800 shares. Using the above information, prepare the required journal entries on the following dates: a. December 31, 2018 b. January 1, 2019 c. March 31, 2019 d. June 30,2019