3) Angeline bought an RM8,000 hi-fi set through an instalment plan. She has to pay RM4,000 down payment and 10 monthly payments of RM450 each. By using the Constant Ratio formula, find: a) The total interest charged. (2m) b) The instalment price. (2m) c) The simple interest rate charged. (2m) d) The approximate effective rate. (2m) 4) A loan of RM5,000 for 20 months at 10% per annum simple interest rate was settled by making 20 monthly payments. Find the outstanding principal just after the eighth payment by using the Rule of 78. (6m) 4) A loan of RM5,000 for 20 months at 10% per annum simple interest rate was settled by making 20 monthly payments. Find the outstanding principal just after the eighth payment by using the Rule of 78.6m)