Problem 7 [20 points] You borrow a GPM of $280,000 with annual payments and 15-year term. The interest rate is 4.5% and the payment factors om year 1 to year 15 are: 50%, 50%, 50%, 50%, 50%, "15%, 15%, "15%, 75%, 75%, 100%, ..., 100%. Questions: 1. What arethe annual payments for years 1 to 15? 2. What is remaining balance at the end of each year? 3. What are the interest payment and principal payment for years 1 to 15