Axis of symmetry -3 and -8 or 3 and -8
ANSWER
E. 10 and 640
EXPLANATION
The given series is

To find the first term of the series we substitute i=1 to get,


For the last term of the series, we substitute i=4 to obtain,


This implies that,

Therefore the correct answer is E
Do you have a picture or anything that you could show us?
D,A,B,C i think this is correct !