I'm in middle of an exam. Please help asap

Problem 14. (1 point) Consider the function f(z) = x - 4x + 9 on the Interval [0, 4). Verify that this function satisfies the three hypotheses of Rolle's Theorem on the Inverval f(x) is on [0, 4]; f(x) is on (0, 4); and f(0) = f(4) = Then by Rolle's theorem, there exists at least one value c such that f'(c) = 0. Find all such values c and enter them as a comma-separated list. Values of c =: Note: You can earn partial credit on this