Obtain the surface and contour plots for the function z = (x - y 2 )(x -
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Obtain the surface and contour plots for the function z = (x - y2)(x - 3y2). This surface has a singular point at x = y = 0, where the surface has zero slope, but this point does not correspond to either a minimum or a maximum. What type of contour lines corresponds to a singular point?
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