Refer to the square grid below and answer question 9. Which of the following statements is TRUE of the diagram shown above?

1. Check option (1): Point E is north-east of Point F

Point F is at $(4, 2)$ and Point E is at $(3.5, 1)$. From F to E, the direction is South-West, not North-East. So (1) is false.

2. Check option (2): Point D is north-east of Point E

Point E is at $(3.5, 1)$ and Point D is at $(3, 2)$. From E to D, the direction is North-West, not North-East. So (2) is false.

3. Check option (3): Point D is north-east of Point B

Point B is at $(4, 4)$ and Point D is at $(3, 2)$. From B to D, the direction is South-West, not North-East. So (3) is false.

4. Check option (4): Point F is north-east of Point E

Point E is at $(3.5, 1)$ and Point F is at $(4, 2)$. From E to F, the direction is towards the top-right, which corresponds to North-East. So (4) is true.