Find the maximum and minimum values of f(x, y) = x² - 2y - y² subject to x² + y² ≤ 4. (a) Use methods from section 14.7 to find the critical points of f(x, y) in the region x² + y² < 4. (b) Use Lagrange multipliers to find critical points of f(x, y) on the boundary x² + y² = 4. (c) Determine the absolute maximum and minimum.

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