A couple has decided to purchase a $$130000$ house using a down payment of $$20000.$ They can amortize the balance at $8\%$ over $30$ years.

a$)$ What is their monthly payment?

Answer $=$ $

b$)$ What is the total interest paid?

Answer $=$ $

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

Answer $=$ $

d$)$ What is the equity after $25$ years?

Answer$=$$