Consider the function f(1) = 3x^3 – 4x on the closed interval [1,6].Find the exact value of the slope of the secant line connecting (1, f(1)) and (6, f(6)).m =_____________By the Mean Value Theorem, there exists c in (1,6) so that m = f'(c). Find all values of such c in (1,6).Enter exact values. If there is more than one solution, separate them by a comma.c=________________