For the given graphical representation of vector v, estimate a1 and a2 so that 
and calculate 
.
A. a1 = 10, a2 = 8; 
= 12.8
B. a1 = 8, a2 = -10; 
= 12.8
C. a1 = 10 a2 = 8; 
= 164
D. a1 = -10, a2 = 8; 
= 12.8
Answer: D
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