Chapter R - Section R.1 - Basic Concepts - R.1 Exercises - Page 9: 5

$z=\{ 5, 6, 7,8,...\}$

Integers are the negative, zero, and positive numbers which include $\{...,-3,-2,-1,0,1,2,3...\}$. Hence, the integers, $z$, greater than 4 are \begin{array}{l}\require{cancel} z=\{ 5, 6, 7,8,...\} .\end{array}