A. A uniform surface charge density of 3 nC/m exists everywhere in the x-y plane, and a uniform line charge density of -2 nC/m exists everywhere along the z-axis. Find the electric field at the point (x, y, z) = (1,0,2)m. B. A uniformly charged wire with a charge density of p extends along the z-axis from z = 0 to z = d. Determine the field at a point (p, o, z) for the case z = 0. C. A surface charge of density ps = c/p exists in the x < 0 half of the xy-plane in the region p < b. Find the electric field at the point (x, y, z) = (0, 0, -6) where b > 0.