Can someone give me a couple hints to get me started on this problem, Im not sure where to go next. Infinite line of charge has charge per unit unit length 4.8*10^-6 and lies along the x axis. A second uniform line of charge with charge/unit length -2.4*10^-6 is parallel to the x axis at y=4. What is the net electric field at y=2 and y=6? I used the formula E= lamda/2(pi)(epsilon naught)(r) but I am not sure what to put in for r and where to go next.