Which of the following statements are always true: (1) Any continuous functions have global maxima and minima on every closed, bounded interval. (2) A critical point must be a local maxima or a local minima point. (3) A function defined on all points of a closed interval always has a global maximum and a global minimum. O (1) (2) (3) (1) and (2) O (1) and (3) O (2) and (3) all of them O None of them