A loan of $$10,000$ is being repaid with $20$ non$-$level annual payments.

The interest rate on the loan is an annual effective rate of $6\%.$ The loan was originated

$4$ years ago. Payments of $$500$ at the end of the first year, $$750$ at the end of the

second year, $$1,000$ at the end of the third year and $$1,250$ at the end of the fourth

year have been paid. Calculate the outstanding balance immediately after the fourth

payment

no excel table please