Mr. and Mrs. Spirit purchased a $35,000 home 20 years ago. They took a 30- year mortgage for $30,000 at a 3% annual interest rate. Their bank, the First Amityville National Bank, has recently offered the Spirits two alternative by which they could prepay their mortgage. The Spirits have just made their 20th annual payment. Under the first alternative, the Spirits could prepay their mortgage at a 30% discount from the current principal outstanding. If current 10-year mortgage rates are 12%, should the Spirits accept the offer? Ignore taxes and assume payments are made at the end of each year (instead of monthly). The second alternative would replace their existing mortgage with a five-year zero-interest loan, in the amount of their current mortgages principal outstanding. This new loan was to be repaid in 5 equal annual payments. The banker pointed out that this option would save them well over $2,000 in interest.