(a) Use a graphing utility to graph f(x)=0.2x4 +0.2x3 -0.8x2 +4 on the interval [-3,2] and approximate any local maxima and local minima. (b) Determine where f is increasing and where it is decreasing. G Use MAXIMUM to find the local maximum of the graph. The local maximum occurs at x=0 and has a value of y = 4. (Round to two decimal places.) Use MINIMUM to find the local minima of the graph. The local minima occur at x, R and at x2 and have values of y and y2 (Round to two decimal places. Use the smaller x-value as x.) G