I have to get all of them correct and for some reason I can't seem to get the right combination. How do you evaluate these?

For each the following sequences, enter "A" (without the quotation marks) if is arithmetic, "G" if it is geometric, and "N" if it is neither arithmetic, nor geometric.

http://webwork1.math.utah.edu/webwor...c843dbca81.png

http://webwork1.math.utah.edu/webwor...097122a031.png

http://webwork1.math.utah.edu/webwor...bb89717401.png

http://webwork1.math.utah.edu/webwor...1fe301e911.png

http://webwork1.math.utah.edu/webwor...f83eab8771.png

http://webwork1.math.utah.edu/webwor...3d3f048c31.png

Thank you!