An infinite line of charge with charge density = 4.5 C/cm is aligned with the y axis, as shown. A point P is located at (x, y) = (a,0), where a = 7.2 cm. Later, another infinite line of charge with charge density A = -13.5 C/cm is added parallel to the y axis at x = a = 3.6 cm. A cylindrical surface of radius a and height h = 10.5 cm is coaxial with the y axis and centered on the origin, as shown. -h- 2 + a -h- - a 2 2 a/2 22 P Finally, the initial infinite line of charge is moved so that it is parallel to the y axis at x = -3.6 cm, as shown. X 22 P X Macmillan Learning In the configuration with two lines of charge, where one line of charge is along the y axis, what is the x component Ex(P) of the electric field at point P? EX(P) = N/C