o3-16 Problems: 3.22 Four concentric spherical shells of radii 0.2m, 0.4 m, 0.6 m, and 0,8 m are supporting uniform charge distributions of 10, -2, -0.5, and 0.5 C/m2, respectively. Determine the E field at a radius of (a) 0.1 m, (b) 0.3 m, (c) 0.5 m (d) 07 m and (e) lm.