A $20$ year bond was issuded $16$ years ago at par. The coupon rate is $5\%$ paid semi$-$annually. $M=$$$1000.$ The bond is currently

trading at $$952.$ What annual rate of interest should be used when computing the firm's WACC? The yield on T$-$Bills is currently

$3\mathrm{.}75\%$

a$.5\%$

b$.2\mathrm{.}5\%$

c$.3\mathrm{.}2\%$

d$.6\mathrm{.}4\%$

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