Positive electric charge is distributed along the y-axis with charge per unit length (a) Consider the case

Question:

Positive electric charge is distributed along the y-axis with charge per unit length λ
(a) Consider the case where charge is distributed only between the points y = a and y = -a. For points on the + x-axis, graph the x-component of the electric field as a function of x for values of x between x = a/2 and x = 4a.
(b) Consider instead the case where charge is distributed along the entire y-axis with the same charge per unit length λ. Using the same graph as in part (a), plot the x-component of the electric field as a function of x for values of x between x = a/2 and x = 4a.Label which graph refers to which situation.