Find the local maximum and minimum values and saddle point(s) of the function. If you have three-dimensional graphing software, graph the function with a domain and viewpoint that reveal all the important aspects of the function. (Enter your answers as a comma- separated list. If an answer does not exist, enter DNE.) F(x, y) = 7 - 2x + 4y - x2 - 4y2 local maximum value(s) local minimum value(s) DNE saddle point(s) (x, y, ) = DNE

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