Company A$\text{'}$s bonds currently sell for $$1,270$ and have a par value of $$1,000.$ They pay a $$90$ annual coupon and have a $20-$ year maturity, but they can be called in $4$ years at $$1,060.$ What is their yield to call $($YTC$)?$

a$.3\mathrm{.}14\%$

b$.3\mathrm{.}40\%$

c$.6\mathrm{.}67\%$

d$.6\mathrm{.}54\%$

e$.7\mathrm{.}09\%$