An infinite line of charge (positive linear charge density o) along the z-axis is surrounded by a hollow, infinitely long charged cylindrical shell (radius r, negative surface charge distribution o(s = r) = -ao) centered on the z-axis a. use coulomb's law to write an integral expression for the electric field at an arbitrary point (s, 4, z) b. use gauss's law to find expressions for the electric field in all regions of space graph the x-component of the electric field as a function of position along the x- axis c.