8(10 points). which of these relations on the set of all functions from z to z are equivalence relations? determine the properties of an equivalence relation that the others lack. (b) {(f, g) i f(0) g(0) or f(1)-g(1)} (e) ((u. g) i f(x)-9()1 for all r z) (d) {(f, g) | (e) ((f. g)if(0) g(1) and f(1) g(0) for some ce z, for all z e z, f(a) -g(x) = c}