(2 points) (Exercise 3.32) a) Find the present value of an annuity-immediate which pays 1 at the end of each half-year for 9 years, if the rate of interest is 4.6% convertible semiannually for the first 5 years and 10.9% convertible semiannually for the last 4 years. ANSWER (round to 3 decimal places)= b) Find the present value of an annuity-immediate which pays 1 at the end of each half-year for 9 years, if all payments in the first 5 years are discounted at a nominal interest rate 4.6% convertible semiannually and all payments in the last 4 years are discounted at a nominal interest rate 10.9% convertible semiannually. ANSWER (round off to three decimal digits)=