Bob purchases a home for150k.he decides on a 5%down payment.the mortgage is an8%,30 yr fix mortgage?

1. what is the amount of down payment?
2. what is the loan amount?
3. if brown earns 1.75% of the loan amount, what will brown's earnings be?,
4. if buyer decides to put down a down payment of 20% instead of 5%, how much more must the buyer come up with?