It is given that Universal is equal to (1, 2, 3, 4, 5, 6, 7, 8, 9). A is equal to (1, 2), and B is equal to (1, 2, 3, 4). Draw a Venn diagram to illustrate the given information.

Here is the Venn diagram illustrating the given information:

```
A: 1, 2
/ \
/ \
B: 1, 2, 3, 4
```

In this Venn diagram, set A is represented by the circle on the left with elements 1 and 2, and set B is represented by the circle on the right with elements 1, 2, 3, and 4. The Universal set is represented by the rectangle enclosing both circles.

Universal Set (U): {1, 2, 3, 4, 5, 6, 7, 8, 9}

Set A: {1, 2}

Set B: {1, 2, 3, 4}

Venn Diagram:

[Image of a Venn diagram with three circles: Universal (U), A, and B. A and B overlap in the center.]

The Venn diagram shows that:

- Universal set U contains all the numbers from 1 to 9.
- Set A is a subset of Universal, consisting of the numbers 1 and 2.
- Set B is also a subset of Universal, consisting of the numbers 1, 2, 3, and 4.
- The overlap between A and B represents the numbers that are common to both sets, which are 1 and 2.