A corporate bond with semi$-$annual interest payments has a yield to maturity of $765\%$ and a current yield of $7\mathrm{.}21\%.$ If the bond has a par value of $$1,000$ and is currently trading at $$950,$ how many years are left to maturity?

$17\mathrm{.}63$

$8\mathrm{.}65$

$8\mathrm{.}81$

$17\mathrm{.}31$

$27\mathrm{.}11$