## Precalculus (6th Edition)

$\left\{1, 2, 3, 4\right\}$
Natural numbers are the numbers $1, 2, 3, 4, . . .$. Not greater than 4 means 4 or less. Thus, the natural numbers not greater 4 are 1, 2, 3, and 4 Therefore, writing the given set in roster method gives: $\left\{1, 2, 3, 4\right\}$