You want to buy a house and can afford monthly mortgage payments of $850. You plan to take out a 20-year loan. The currently available rate is an APR of 3.72%. Your mortgage lender predicts that the rate could rise to 4.22% in the near future. If the APR rises from 3.72% to 4.22%, will the maximum loan amount that you can afford increase or decrease? By how many dollars? If the APR rises from 3.72% to 4.22%, the maximum loan amount that you can afford will --- by $