Question 4 a) b} Mr. and Mrs Lim have a 1 year-old son now. They want to have RM D when their son reaches age of 19 as his tertiary education fund. From now, Mr. Lim deposited RM 40 000 in a bank which pays 3.2% annual interest rate compounded every month, while Mrs. Lim invests RM S at the end of every six months in an account which guarantees an annual interest rate of 6% compounded semi-annually. The total interests earn in both their savings after 18 years will be RM 69 422.57. Find the values of D and S. (7' marks) Miss Lam borrowed a sum of amount RM P from two money lenders for 14 months. First lender charged RM X at simple interest rate of 3% per annum and second lender charged RM Y at simple interest rate of 9% per annum. The amounts of RM X and RM Y are in ratio 1: 4. She paid a total of RM 1 365 as interest after 14 months. Find the value of P. (6 marks)