A couple has decided to purchase a $$130000$ house using a down payment of $$11000.$ They can amortize the balance at $7\%$ over $20$ years.

a$)$ What is their monthly payment?

Payment $=$$

b$)$ What is the total interest paid?

Total interest paid $=$$

c$)$ What is the equity after $5$ years?

Equity after $5$ years $=$$

d$)$ What is the equity after $15$ years?

Equity after $15$ years $=$$