Answer
See below.
Work Step by Step
As we can see from the graph:
a) $f(x)=50$ when $x=40$
b) $f(x)=80$ when $x=88$
c) $f(x)=0$ when $x=-40$
d) $f(x)\gt50$ when $x\gt40$
e) $f(x)\leq80$ when $x\leq88$
f) $0\lt f(x)\lt80$ when $-40\lt x\lt88$
