Find the critical points of the following function. Use the Second Derivative Test to determine (if possible) whether each critical point corresponds to a local maximum, local minimum, or saddle point. If the Second Derivative Test is inconclusive, determine the behavior of the function at the critical points. f(x.y) = 7x2 - 3y2-4 What are the critical points? (Type an ordered pair. Use a comma to separate answers as needed.)

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