8 Assuming that the electric field density is E a,100x (V/m), find the total electric charge contained inside a) a cubical volume 100 (mm) on a side centered at the origin, b) a cylindricl volume of radius 50 (mm) and Height 100 (mm) centered at the origin. A spherical distribution of charge p = Po/[1-(R/b)] exists in the region 0SRS6. This charge distributidn is concentrically surrounded by a conducting shell with inner radius R; (>b) and outer radius R,. Determine E everywhere.