10. A $200,000 mortgage at 6.6% compounded semiannually with a 30-year motion s monthly payments. The mortgage allows the borrower to prepay up to 10% of the principal once each year. How much will the amortization period be shortened it on the for anniversary of the mortgage, the borrower makes (in addition to the regulament prepayment of a 10,000? (45 months=3 years and 9 months) b. 520,000? (82 months=6 years and 10 months)