Answer:
The face value is $4,000.
Explanation:
The face value of a bond is also called its spar value. It is the price of the bond when it is issued first. The price of a bond changes with changes in the interest rates but the face value remains constant.
Here, the price of the bond when it was issued for the first time is $4,000. so its face value is $4,000. The price at maturity is $5,000. The bond is being discounted at a premium or above par value.