hi there i have just started an electricity course and was wondering if any of you know where i could find an answer key for the text by sears and zemansky called university physics. Or perhaps someone will know how to to this question: Positive electric charge is distributed along the y-axis with charged per unit lenght of (lamda). 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. My big question is how do you graph this?