Try to solve in 30 minute A debt of $8,000 accumulated interest at 2.5% compounded annually for 15 months, after which the rate changed to 8.0% compounded semiannually for the next six months. What...

Try to solve in 30 minute A debt of $8,000 accumulated interest at 2.5% compounded annually for 15 months, after which the rate changed to 8.0% compounded semiannually for the next six months. What was the total amount owed at the end of the entire 21-month period?