8. Find the c value(s) that satisfy Rolle's Theorem for the function f (x) = 2 1x4 + 2x3 + - x? + 6x -5 on the interval [-5, 1]. 9. Find the c value(s) that satisfy Rolle's Theorem for the function f (x) = x3 - 2x2 - 5x + 6 on the interval [-2, 3]. 10. Find the c value(s) that satisfy Rolle's Theorem for the function f (x) = x* + 5x3 - 4x2 - 44x - 48 on the interval [-4, 3]