Solve and provide steps:

10. Consider again problem \#9. You shop around a bit and find a company that will give you a second mortgage on the marginal amount at 7%. So, this would mean that you would take out the 80% loan at 3.5% for 30 years and then also an additional 10% LTV second loan at 7%, also for 30 years. a. Assuming you kept both loans until maturity, what would be the effective cost of your total financing over the 30 years