An interest-only mortgage is made for $112,000 at 4.5 percent annual interest for 10 years. The lender and borrower agree that monthly payments will be constant and will require no loan amortization. a. What will the monthly payments be? b. What will be the loan balance after four years? c. If the loan is repaid after four years, what will be the yield to the lender? d. Instead of being repaid after four years, what will be the yield if the loan is repaid after 10 years?