$12.)$ A ten$-$year $3\%$ bond with semiannual coupons is purchased to yield $6\%$ compounded semiannually The par value and redemption value are both $1,000.$ What is the book value of the band four years after issue of the bond? $($Hint: find the Plice of the bord using TMV function, then use AMORT function from your $($calculator$)$