Adams Enterprises$$ noncallable bonds currently sell for $$1,180.$ They have a $12-$year maturity, an annual coupon of $$85,$ and a par value of $$1,000.$ What is their yield to maturity?

a$.5\mathrm{.}84\%$

b$.6\mathrm{.}32\%$

c$.6\mathrm{.}47\%$

d$.6\mathrm{.}99\%$

e$.7\mathrm{.}17\%$