(a) Calculate the total amount of interest that will be paid on a $400,00020-year loan with monthly repayments, given a loan interest rate of 6% p.a. compounding monthly. [4 marks] (b) You have an investment account which will pay you \$1,000 per year for five years, starting six years from now. What is the present value of these payments if the interest rate is 6%p. . compounding semi-annually? [9 marks]