An investor purchased a convertible bond for $6000 four years ago. The bond has a face value of $10,000 and a bond interest rate of 8% payable semiannually. The investor can sell the bond now for $7500. If the investor keeps the bond, she thinks she can sell it for $8000 one year from now, $9100 two years from now, or get $10,000 upon maturity 3 years from now. What should she do if her MARR is 12% per year compounded semiannually