1. Problem: draw and, for sets like $a$ or $b$, give an example instead of a general explanation. 2. This is a request for a simple set example, so we can use two sets and show one concrete draw-and-example view. 3. Let the example sets be $a=\{1,2,3\}$ and $b=\{3,4\}$. 4. The rule for set notation is that a set lists its elements inside braces, and the order does not matter. 5. A basic relationship example is the union: $$a\cup b=\{1,2,3,4\}$$ 6. A basic relationship example is the intersection: $$a\cap b=\{3\}$$ 7. So the example answer is: $a=\{1,2,3\}$ and $b=\{3,4\}$, with $a\cup b=\{1,2,3,4\}$ and $a\cap b=\{3\}$. 8. If you want, I can also draw this as a Venn diagram.