Density, density, density.(a) a charge-304e is uniformly distributed along a circular arc of radius 6,70 cm, which subtends an angle of 519. what is the linear charge density along the arc? (b) a charge 304e is uniformly distributed over one face of a circular disk of radius 2.80 cm. what is the surface charge density over that face? (c) a charge-304e is uniformly distributed over the surface of a sphere of radius 4.20 cm, what is the surface charge density over that surface? (d) a charge-304e is uniformly spread through the volume of a sphere of radius 4.90cm. what is the volume charge density in that sphere?