Consider the function f(:t) : 2x3 6.2 on the interval [4, 4]. (a) The slope ofthe secant line joining (4, f(4)) and (4, f(4)) is m : (b) Since the conditions of the Mean Value Theorem hold true, there exists at least one c on (47 4) such that f'(c) : (c) Find c. Note: If there is more than one answer, separate them with a comma