Answer
absolute maximum $f(4)=4$, absolute minimum $f(5)=0$, local maximum $f(4)=4$, local minimum $f(1)=1$.
Work Step by Step
Based on the given graph, we can find the absolute maximum $f(4)=4$ and the absolute minimum $f(5)=0$, we can also identify the local maximum $f(4)=4$ and the local minimum $f(1)=1$.