Problem:
A couple has decided to purchase a $120000 house using a down payment of $18000. They can amortize the balance at 10% over 20 years.
Requirement:
Question 1: What is their monthly payment?
Question 2: What is the total interest paid?
Question 3: What is the equity after 5 years?
Question 4: What is the equity after 15 years?
Note: Please provide full description.