Find all the local maxima, local minima, and saddle points of the function.
A. f(-5, -10) = 2249, local maximum; f(5, 10) = -2251, local minimum
B. f(5, 10) = -2251, local minimum; f(5, -10) = 1749, saddle point; f(-5, 10) = -1751, saddle point; 
local maximum
C. f(-5, -10) = 2249, local maximum
D. f(5, -10) = 1749, saddle point; f(-5, 10) = -1751, saddle point
Answer: B
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