4. Find an inverse for the following functions. Be careful! Some of this func- tions are not injective, so determine a maximal domain where the inverse is defined: (a) f(x)=3x-2 (b) g(x) = x+1 (c) h(x) = x+4 (d) k(x)=x-3 (e) m(x) 2x-1 = x+3 (f) n(x) = x + 5 when x 0