help please!

ALL answers should be in complete sentences. Follow the APA Guidelines. Show all work. For full credit, work must lead to answer. Problem: A couple buys a house for $285,000. He pays $60,000 down and takes out a mortgage at 4% on the balance. Compute their monthly payment AND the total amount of interest they will pay if the payments are made on time and the length of the mortgage is a) 15 years b) 25 years c) Make an argument for each situation? d) How might the argument be influenced by the age of the couple? Specifically, what factors should be considered if the couple is in their thirties versus in their fifties