Determine whether Rolle's Theorem can be applied to f on the closed interval [a, b]. (Select all that apply.) f (x) = x2- 5x+4, [1, 4] Yes. No, because f is not continuous on the closed interval [a, b]. No, because f is not differentiable in the open interval (a, b). O No, because f (a) # f (b), If Rolle's Theorem can be applied, find all values of c in the open interval (a, b) such that f '(c) = 0. (Enter your answers as a comma-separated list. If Rolle's Theorem cannot be applied, enter NA.) C = 1, 4 X