Consider the following electrostatic problem. A perfectly conductive spherical conductor of radiusa=5cm is covered by a dielectric layer extending to a radius of b%3D8cm in free space. Relativeelectrical permittivity of the dielectric iS E 4, and Electric Flux Density expression in the mediumis given as (D = 0.05r-u,: Cim, for ra), where r is radial distance from the center of sphere.a) What is the total charge on the conductor surface?b) Determine Electric field intensity for each region (r

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