3. The mortgage on your house is 8 years old. The original maturity was 25 years, and your monthly payment is $975. The interest rate is 6.5% APR. Interest rates have fallen, and you have decided to refinance. The mortgage interest rate today is 3.7% APR. If you continue making the same monthly payment for the remaining term of the original mortgage, how much cash will you have left over after paying off the balance of the original mortgage?

Please provide excel formulas