A mortgage loan in the amount of $100,000 is made at 12 percent interest for 20 years. Payments are to be monthly.
1) What will the loan balance be at the end of year 5 if the loan is fully amortizing?
2) Assume that the lender charges 3 points to close the loan. What would the APR be if it is a negative amortizing loan and the loan balance will be $150,000 at the end of year 20?