Find all local extreme values of the given function and identify each as a local maximum, local minimum, or saddle point.
A. f(8, 0) = -4, local minimum; f(0, 8) = -4, local minimum
B. f(8, 8) = 8188, local maximum
C. f(0, 0) = -4, saddle point; f(8, 8) = 8188, local maximum
D. f(0, 0) = -4, test is inconclusive
Answer: D
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