Answer:
[tex]\large\text{The graph in the attachment.}\\\\z\leq11\to z\in(-\infty,\ 11][/tex]
Step-by-step explanation:
[tex]16\geq4(z-7)\qquad\text{divide both sides by 4}\\\\4\geq z-7\qquad\text{add 7 to both sides}\\\\11\geq z\to z\leq11[/tex]
