Relaunch to update

The $30-$year, $5\mathrm{.}5$ percent bonds issued by Modern Kitchens pay interest semiannually,

$1$:$12$:$31$ mature in four years, and have a $$1,000$ face value. Currently, the bonds sell for $$1,020\mathrm{.}66.$

a$.2\mathrm{.}68\%$

b$.4\mathrm{.}41\%$

c$.5\mathrm{.}39\%$

d$.2\mathrm{.}46\%$

Unsure e$.4\mathrm{.}92\%$