A $$25,000$ bond redeemable at par on May $21,2018$ is purchased on September $16,2007.$ Interest is $6\mathrm{.}4\%$

payable semi$-$annually and the yield is $9\mathrm{.}6\%$ compounded semi$-$annually.

$($a$)$ What is the cash price of the bond?

$($b$)$ What is the accrued interest?

$($c$)$ What is the quoted price?