please use what if anaysis in excel and provide the excel sheet with all information required. A real estate agent has a client who is purchasing a house for $450,000. They want to give the client options on how changes in interest rate and down payment affect monthly cost. The purchaser wants a 30 -year loan ( 360 payments). If they cannot afford 20% down, they have to pay $100 per month for mortgage insurance. Attach a What-If contingency table that looks at two variables (down payment = 20% down or 0% down) and (interest rate (APR) =2%,2.5%,3.0%,3.5%. and 4.0% )