18. FOLLOW THE INSTRUCTIONS MUST BE NEAT AND ORGANIZED TRY NOT TO USE ALL OF THE SPACE IF POSSIBLE SHORTEN THE ANSWER TO INCLUDE RELEVANT INFORMATION.

18. (12 pts) Find any critical points of f and determine if they are local maxima or minima. Give both x and y values. Find intervals over which f is increasing or decreasing f(x) = 3x2e-2x- 4