2 A function f is continuous on 2 2 and some of the values of f are shown to the right x f x 2 3 If f has only one root r on the closed interval 2 2 and r 0 then a possible value of b is e 1 a 3 b 2 c 1 d 0 Explain your reasoning in full sentences Hint Draw a picture 06 b 24