29. compute the final balloon payment (due at the end of the mortgage) on a 7 year $545,000 mortgage with a quoted apr of 4.36% that has a constant monthly payment of $3,142+u dollars per month in 7 years?

30. compute how long it would take you to pay back a credit card loan balance of $5,000 if the apr is 13.94% and you make payments of $200+u dollars per month?

u=12