Bond C makes semi$-$annual payments, has a maturity of $5$ years and has a coupon rate of $12,5\%.$ Bond D has a maturity of $6$ years and a coupon rate of $12,2\%.$ The nominal value of each bond is R$15000$ and the interest rate in the market is $12\mathrm{.}35\%.$

$($a$)$ What is the value of Bond C

$($b$)$ What is the value of Bond D

$($c$)$ Which bons is trading at a premium and which one is trading at a discount