Schwebach Industries has a bond outstanding with $25$ years to maturity, a $9\%$ coupon paid semiannually, and a $$1,000$ par value. The bond has a $7\mathrm{.}4\%$ nominal yield to maturity, but it can be called in $5$ years at a price of $$1,077\mathrm{.}91.$ What is the bond$$s nominal yield to call?

a$.5\mathrm{.}45\%$

b$.6\mathrm{.}10\%$

c$.6\mathrm{.}52\%$

d$.7\mathrm{.}00\%$

e$.7\mathrm{.}35\%$