5 What must Bill McGuire invest today to receive an annuity of $12,000 for four years semiannually at a 10 percent annual rate? All withdrawals will be made at the end of each period. 6 What must Bill McGuire invest today to receive an annuity due of $9,000 for four years semi- annually at an 8 percent annual rate? All withdrawals will be made at the begging of each period