(1 point) (Exercise 3.32) a) Find the present value of an annully-immediate which pays 1 at the end of each half year for 8 years, the rate of interest is 5.6% convertible semiannually for the first 4 years and 10,8% convertible semiannually for the last 4 years. ANSWER (round to 3 decimal places)- 12.18 b) Find the present value of an annuity immediate which pays 1 at the end of each half year for 8 years, if all payments in the first 4 years are discounted at a nominal interest rate 5.6% convertible semiannually and all payments in the last 4 years are discounted at a nominal interest rate 10.8% convertible semiannually ANSWER (round off to three decimal digits)