Which of the following statements is incorrect?

a. If the coupon rate of a bond is below the investor's required rate of return, the present value of the bond should be above the par value.

b. If the coupon rate of a bond is above the investor's required rate of return, the present value of the bond should be above the par value.

c. If the coupon rate of a bond is below the investor's required rate of return, the present value of the bond should be below the par value.

d. If the coupon rate of a bond is equal to the investor's required rate of return, the present value of the bond should be equal to the par value.

e. All of these statements are correct.