1) Find the monthly payment on a $100,000, 25-year mortgage at 12% interest compounded monthly.

2) Consider a $58,331 30-year mortgage at interest rate 12% compounded monthly with a $600 monthly payment. What is the unpaid balance after the first 3 months?

3) Susie takes out a car loan for $8000 for a term of 3 years at 11% interest compounded monthly. Find the total amount of interest she pays.