72. Currently, you owe the bank $19,600 for a car loan. The loan has an interest rate of 7.75 percent and monthly payments of $620. Your financial situation recently changed such that you can no longer afford these payments. After talking with your banker and explaining the situation, he has agreed to lower the monthly payments to $450 while keeping the interest rate at 7.75 percent. How much longer will it take you to repay this loan than you had originally planned?

73. You have $25,000 saved in a bank account paying monthly interest with an APR of 2.0%. If you deposit an additional $1,000 each month beginning in one month and ending in one year, how much will be in the account immediately after the last deposit (and assuming you didnt take anything out!)?

74. A financial institution is selling a unique structured investment (well, not really, its just a corporate bond). The investment will require investors to pay $1.1M today. They will then receive ten annual cash flows of $70,000 beginning in one year. And a single cash flow of an additional $1M coinciding with the last of the $70,000 making the last payment at year ten equal $1,070,000. What annual return are investors earning on this investment?