(a) A charge -344e is uniformly distributed along a circular arc of radius 6.20 cm, which subtends an angle of 48o. What is the linear charge density along the arc? (b) A charge -344e is uniformly distributed over one face of a circular disk of radius 4.30 cm. What is the surface charge density over that face? (c) A charge -344e is uniformly distributed over the surface of a sphere of radius 4.70 cm. What is the surface charge density over that surface? (d) A charge -344e is uniformly spread through the volume of a sphere of radius 4.00 cm. What is the volume charge density in that sphere?