pouhvdthh8475 pouhvdthh8475 23-05-2023 Mathematics contestada Please answer both parts [6 marks] 12. ANSWER ONE OF THE FOLLOWING TWO PARTS a) OR b). (a) Let g(x) = f(x²), where ƒ is twice differentiable for all x. Suppose f'(x) > 0 for all x 0, and f is concave downward on (-[infinity], 0) a