Find all local extreme values of the given function and identify each as a local maximum, local minimum, or saddle point.
A. 
local maximum; 
local minimum
B. 
local maximum; 
saddle point; 
saddle point; 
local minimum; 
local minimum
C. 
local maximum; 
local minimum; 
local minimum; 
local minimum; 
local minimum
D. 
local maximum; 
saddle point; 
saddle point; 
saddle point; 
local minimum; 
local minimum; 
saddle point; 
local minimum; 
local minimum
Answer: D
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