A $1000 loan was made at 15% interest compounded quarterly. The loan will be repaid with payments of $400 at the end of the first quarter, $6090 at the end of the fifth year, and the remaining balance at the end of the tenth year. The question is to calculate the amount of the final payment.

1. a loan of 1000 is made at an interest of 15% compounded quarterly. the loan is to be repaid with
three payments: 400 at the end of the first quarter, 6090 at the end of the fifth year, and the
balance at the end of the tenth year. calculate the amount of the final payment