Please explain the algebra for b and how to justify c

4. {7m} Consider the function f (:13) = 332/3 + 3:2 on the interval [1, 1]. (a) Show that f(1): f(1). (b) Show that there is no real number 0 in the interval (1, 1) such that f'[c) = 0 ((3) Explain why does part (b) not contradict the Roe's Theorem