Problem 5 (11 points) (a) A loan of amount L is repaid by n payments made at times t1,t2,,tn. We let Pk be the amount of kth repayment. We let OLBk be the outstanding balance just after kth repayment. By considering the relation between OLBk1 and OLBk, Show that for any non-negative integers k and m, we have OLBk+m={FuturevalueofOLBkattimetk+m}{Futurevalueofrepaymentsmadebetweentkandtk+m}. (b) A person borrows an amount of $120000. He agrees to repay the loan by m level quarterly regular payment with amount $X each plus 1 balloon payment to be paid 3 months after the mth repayment. It is also given that the loan charges compound interest at a quarterly effective interest rate i>0. You are given that - The outstanding balance at kth repayment date is OLBk=59471.358. - The outstanding balance at (k+4)th repayment date is OLBk+4=49865.692. - The outstanding balance at (k+12)th repayment date is OLBk+12=27559.263. (*Here, k+12m ) Question Find the total amount of interest paid by the borrower over the entire loan. Problem 5 (11 points) (a) A loan of amount L is repaid by n payments made at times t1,t2,,tn. We let Pk be the amount of kth repayment. We let OLBk be the outstanding balance just after kth repayment. By considering the relation between OLBk1 and OLBk, Show that for any non-negative integers k and m, we have OLBk+m={FuturevalueofOLBkattimetk+m}{Futurevalueofrepaymentsmadebetweentkandtk+m}. (b) A person borrows an amount of $120000. He agrees to repay the loan by m level quarterly regular payment with amount $X each plus 1 balloon payment to be paid 3 months after the mth repayment. It is also given that the loan charges compound interest at a quarterly effective interest rate i>0. You are given that - The outstanding balance at kth repayment date is OLBk=59471.358. - The outstanding balance at (k+4)th repayment date is OLBk+4=49865.692. - The outstanding balance at (k+12)th repayment date is OLBk+12=27559.263. (*Here, k+12m ) Question Find the total amount of interest paid by the borrower over the entire loan