2 stands for 10 to 12.

3 stands for 2 to 4 o'clock.

4 stands for 4 to 6.

You are very good, we still have five ... Arabic is bitter.

In the same way.

1 is the first category, from 8 to 9 o'clock.

2 is the second quarter, to 10.

Because two classes make up one class, 1 2 is connected.

Do you understand?