Trickle Corporation's $17$ percent coupon rate, semiannual payment, $$1,000$ par value bonds which mature in $20$ years. The bond currently sell for $$1,230\mathrm{.}51$ in the market. What is the bond Yield to Maturity $($YTM$)?$

a$.)6\mathrm{.}81\%$

b$.)6\mathrm{.}8\%$

c$.)13\mathrm{.}6\%$

d$.)13\mathrm{.}62\%$