Motorola Motor firm has notes payable of $$1,800,000,$ long$-$term debt of $$13,000,000,$ and total interest expense of $$1,300,000.$ If the firm pays $8$ percent interest on its long$-$term debt, what rate of interest does it pay on its notes payable?

a$.11\mathrm{.}2\%$

b$.14\mathrm{.}4\%$

c$.16\mathrm{.}8\%$

d$.12\mathrm{.}0\%$

e$.15\mathrm{.}3\%$