Cost of debt. Dunder$-$Mifflin, Inc. $($DMI$)$is selling $600,000$bonds to raise money for the publication of new magazines in the coming year. The bond will pay a coupon rate of $15\mathrm{.}7\%$with semiannual

payments and will mature in $30$years$.$ Its par value is $$100.$What is the cost of debt to DMI if the bonds raise the following amounts $($ignoring issuing costs$)?$

a$.$$$58,776,000$

b$.$$$58,632,000$

c$.$$$61,632,000$

d$.$$$72,828,000$

a$.$What is the cost of debt to DMI if the bonds raise $$58,776,000?$

b$.$What is the cost of debt to DMI if the bonds raise $$58,632,000?$

c$.$What is the cost of debt to DMI if the bonds raise $$61,632,000?$

d$.$What is the cost of debt to DMI if the bonds raise $$72,828,000?$

$\%($Round to two decimal places.$)$