HELP!

What's the future value of $4,800 after 5 years if the appropriate interest rate is 8%, compounded semiannually? a. $10,362.84 b. $3,242.71 c. $7,105.17 d. $7.052.77 e. $5.839.93 Suppose the U.S. Treasury offers to sell you a bond for $737.25. No payments will be made until the bond matures 6 years from now, at which time it will be redeemed for $1,000. What interest rate would you earn if you bought this bond at the offer price? a. 6.29% b. 4.62% c. 4.45% d. 22.61% e. 5.21%