Answer
$\left\{3\right\}$
Refer to the graph/plot below.
Work Step by Step
Recall:
The intersection of sets $A$ and $B$, denoted by $A \cap B$, is the set that contains all the elements that are common to both $A$ and $B$.
The graph shows that only number common to the two sets is $3$.
Thus, the intersection is $\left\{3\right\}$.
Graph this set by plotting a solid dot at $3$.
