Question: In Problems 1-3, find each function's relative maxima, relative minima, and saddle points, if they exist. 1. z = 9 - x2 - y2 2.

In Problems 1-3, find each function's relative maxima, relative minima, and saddle points, if they exist.
1. z = 9 - x2 - y2
2. z = 16 - 4x2 - 9y2
3. z = x2 + y2 + 4

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