Find all relative extrema and saddle points of the function. Use the Second Partials Test where applicable. (If an answer does not exist, enter DNE.) f(x, v) = 2xy - * + y)+ + 4. relative minimum (x, y, z) = (x, y, z) = (smaller x-value) relative maxima (x, y, z) = (larger x-value) saddle point (x, y, z) = -5 y5

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