6 a) The interval(s) of increase: b) The x-coordinate(s) where f'(x) = 0: (-3.5, 5.15) 5 c) The interval(s) of cocave up: d) The sign of the first derivative at x = 0: e) The sign of the second derivative at x = -3: (-2, 0) f) The x-coordinates of the point(s) of inflection: 0 5 g) The coordinates of local minimum: (-1.25, -2.04) h) The coordinate(s) where f'(x) = DNE