$($a$)$ A charge of $330$e is uniformly distributed along a circular arc of radius $4\mathrm{.}15$ cm$,$ which subtends an angle of $42.$ What is the linear charge density along the arc?

C$/$m

$($b$)$ A charge of $330$e is uniformly distributed over one face of a circular disk of radius $1\mathrm{.}95$ cm$.$ What is the surface charge density over that face?

C$/$m$2$

$($c$)$ A charge of $330$e is uniformly distributed over the surface of a sphere of radius $1\mathrm{.}95$ cm$.$ What is the surface charge density over that surface?

C$/$m$2$

$($d$)$ A charge of $330$e is uniformly spread through the volume of a sphere of radius $1\mathrm{.}95$ cm$.$ What is the volume charge density in that sphere?

C$/$m$3$