From the contour map of f shown below decide whether fx, fy are positive, negative, or zero at P. y Ka 1. fx > 0, fy 2. 3. 4. 5. fx > 0, 6. fx > 0, < 0 fx < 0, fy < 0 fx < 0, fy - 0 fx < 0, fy 0 fy > 0 fy = 0 4 6

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