Answer
If $k$ is an integer, then $ceiling(k)$ is the integer $n$ such that $n-1$
Work Step by Step
Note that $\leq$ is a reflexive relation over the real numbers; that is, for any number $x$ like $0$, $3$, $-\frac{13}{2}$, or pi (3.14159...), it is always the case that $x\leq x$, since $x=x$.
