Question: Determine the stationary points of the function f(x, y) = x^4 y^4 4x. For each stationary point use the second order sufficient conditions to determine

Determine the stationary points of the function f(x, y) = x^4 y^4 4x.

For each stationary point use the second order sufficient conditions to determine whether it corresponds to a local maximum, to a local minimum, or to a saddle point.

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