I need some pointers for following problems. it's very urgent

1. Is it possible that the interest rate can be increased to a level where the loan term becomes infinite unless the periodic repayment is increased.

2. Exactly a year ago, Laura borrowed $250,000 from a bank, to be repaid in equal monthly instalments over 20 years at an interest rate of 8 per cent per annum. Today, the bank told them that it was introducing a monthly fee of $10 but she could continue to repay the loan by making her current monthly repayments. How much will be increase in Loan repayment tenure

thanks in anticipation