Recording bond issuance and interest

$P_1{P}_2{P}_3$

On January $1,$ Renewable Energy issues bonds that have a $$20,000$ par value, mature in eight years, and pay $12\%$ interest semiannually on June $30$ and December $31.$

Prepare the journal entry for issuance assuming the bonds are issued at $($a$)99$ and $($b$){103}^{\frac{1}{2}}.$

How much interest does the company pay $($in cash$)$ to its bondholders every six months if the bonds are sold at par?