21. What is the inverse function for y = f(x) = 5 (3x + 5)? (a) x = g(y) = 3(2y -5) 2 (b) y = g(z) = 3x + 5 (c) y = g(z) = 5 - 2x (d) r =g(y) = = (3y +5) (e) x =g(y) 5 - y 6