One year before maturity, the price of a bond with a principal amount of $$1,000$ and a coupon rate of $4$ percent paid annually fell to $$981.$ The new one$-$year interest rate must beQuestion $37$ Answera$\mathrm{.}4$ percent.b$\mathrm{.}1\mathrm{.}9$ percent.c$\mathrm{.}8\mathrm{.}9$ percent.d$\mathrm{.}6\mathrm{.}0$ percent.