Consider a loan for $63,000 having equal payments of $6,404 made at the end of each year for 12 years. Use Excel, a financial calculator or other computational tools to find the interest rate charged on this loan. Suppose you borrow $5,240 at an interest rate of (4) = 5.7%, and agree to repay the loan in quarterly instalments of $260. (a) How many regular payments will you make? (b) How big will the last payment be, if you make the payment one period after the final regular payment?