please show work i need to understand

Consider the following scenarios. You may choose the location for each scenario. You will need to research the appropriate housing information for your chosen location, including mortgage rates with their corresponding down payment. Use technology to answer the questions at the end of each scenario description. Scenario 1: A single person buys a 4-bedroom house and decides to nance the house with a 30-year xed-rate mortgage. They live alone in the house for 4 years and make the required payments. They meet someone and decide to get married. The other person is also working full time, so the couple decides they can afford the payments on a 15-year xed-rate mortgage. They nance the remaining balance of the 30-year loan for 15 years. How much interest did the couple save by changing to the 15-year mortgage? What is the total amount they pay for their house? {Make sure to include both loans.) How much total interest did they pay on their house