Detta borrows $$20,000$ from the bank. For a six$-$year loan, the bank requires annual end$-$of$-$year payments of $$4,878\mathrm{.}05.$ The annual interest rate on the loan is $\_\_\_\_\_\_\_\_.$ Question $12$ options: A$)7$ percent B$)8$ percent C$)11$ percent D$)12$ percent