Physics education research, electronic materials, and the musings of Christopher Moore, Ph.D.

I need urgent help solving a Gauss' Law problem. I have a picture of the problem. It deals with finding an equation to find the electric field between two lines of charge using cylinders as the gaussian surfaces. I really have no option left, and its due in a few hours. I'll email you the picture of the problem if you want to help me solve it.
Your help is extremely appreciated.