(a) Determine if the upper bound theorem identifies 0 as an upper bound for the real zeros off (x). (b) Determine if the lower bound theorem identifies - 2 as a lower bound for the real zeros of f (x), f (x) - 2x- 6x +5x +41x -48x +21 Part: 0 / 2 Part 1 of 2 (a) The upper bound theorem (Choose one) 6 as an upper bound for the real zeros of / (x). X