Malko Enterprises' bonds currently have yield to maturity of $5\mathrm{.}5\%.$ They have a $6-$year maturity, an annual coupon of $$75,$ and a par value of $$1,000.$ What is their current yield? $(6$ points$)$

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

b$.2\mathrm{.}91\%$

c$.6\mathrm{.}82\%$

d$.3\mathrm{.}75\%$

e$.7\mathrm{.}50\%$