1) Elizabeth made a RM200,000, 15-year housing loan with the interest rate 5.4% compounded monthly. After 5 years, the loan's interest rate dropped to 4.8% compounded monthly. Then, she decides to refinance the loan. a) Calculate the monthly payments for the first 5-year period. (4 marks) b) Calculate the outstanding balance after 5 years using: i) Retrospective method. (3 marks) 11) Prospective method. (3 marks) c) From the outstanding balance using retrospective method, calculate the new monthly payments for the remaining 10 years. (3 marks) d) In your opinion, is it worth for her to refinance the loan? State your reason. (2 marks)