#### Answer

$z=\{ ...,-2,-1,0,1,2,3,4 \}$

#### Work Step by Step

Integers are the negative, zero, and positive numbers which include $\{...,-3,-2,-1,0,1,2,3...\}$. Hence, the integers, $z$, less than or equal to $4$ are
\begin{array}{l}\require{cancel}
z=\{ ...,-2,-1,0,1,2,3,4 \}
.\end{array}