7. (a) Harry opened a savings account with a deposit of RM440. He wants to save the same amount at the end of each month so that his savings reach RM13,000 after 5 years. If the 9% savings interest rate is compounded every month, what is the total monthly deposit required? (2 marks) (b) A sum of RM1,500 is deposited on a quarterly basis for 5 years with an interest rate of 5% compounded quarterly. i. What is the future value of the savings? (3 marks) ii. Calculate the amount of compound interest earned from the savings. (2 marks) iii. How much money is needed to be saved in each quarter if the total savings at the end of the 5th year is RM35,000? (4 marks) -2 8. Given that A = 1 1 and B = 2 4 -2 (a) If AB = C = [Cui], find C13, C21 and C32. (3 marks) (b) Determine the determinant of C. (4 marks) (c) If A = 0 i. State why A is not a reduced matrix. (2 marks) ii. Change A into a reduced matrix form