Calculus: Early Transcendentals 8th Edition

a) $4$ b) $3$ c) $0$ d) $Undefined$. See below. e) $4$ f) $-2$
a) $f(g(2))=f(5)=4$ b) $g(f(0))=g(0)=3$ c) $f(g(0))=f(3)=0$ d) $g(f(6))=g(6)= undefined$ because it does not exist on the graph. e) $g(g(-2))=g(1)=4$ f) $f(f(4))=f(2)=-2$