Problem 11. Let f(x,y)=2y^{2)-x(x-1)^(2). Find the critical points off and identify them as maximum, minimum or saddle points, or else degenerate critical points. Sketch the graph of f (or use Maple) in 3-space. Draw the level curves off in the xy-plane. Use Hessian to solve the problem and draw the graph off as well as the level curves off in the xy plane.

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