Please help and show the works please

On June 30, 2016. Mabry Corporation issued $5 million of its 8% bonds for $4.6 million. For effective interest calculations, assume the bonds were priced to yield 10%. The bonds are dated June 30, 2016 and mature in five years. Interest is payable semiannually on December 31 and July 1. a. If the effective interest method is used, by how much should the bond discount be reduced for the 6 months ended December 31, 2016? A) $16,000 B) $20,000 C) $23,000 D) $30,000 b. Record the journal entry. c. If the straight-line interest method is used, by how much should the bond discount be reduce for the 6 months ended December 31, 2016? d. Record the journal entry