7. (10pts) Suppose you took a mortgage of $100,000 on a house to be paid back in full by 10 equal annual instalments, each consisting of the interest due on the outstanding balance plus a repayment of a part of the amount borrowed. If you decided to clear the mortgage after eight years, how much money would you need to pay on top of the 8 th instalment, assuming that a constant annual compounding rate of 6% applies thoroughout the period of the mortgage