Consider a spherical shell with inner radius r = 0.2 m and outer radius r2 = 0.95 m. The hollow inside the shell contains no charge; and charge is distributed on the inside surface of the shell and within the shell itself, such that the electrical field inside the shell itself is everywhere outward pointing and of uniform constant magnitude 32 N/C. 2a What is the charge per unit area on the inner surface at r = r? (Please answer in Sl unit and multiply your answer by 100) 2b What is the charge per unit volume at radius r = 0.55 m (within the material of the shell)?