Bounded Above Subset of Real Numbers/Examples/Finite Set of Reals

Examples of Bounded Above Subset of Real Numbers
Let $I$ be the set defined as:
 * $I := \set {-1, 0, 2, 5}$

Then $I$ is bounded above by, for example, $5$, $6$ and $7$, of which the supremum is $5$.

$5$ is also the greatest element of $I$.