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Dirac delta function problem

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(a) Write an expression for the electric charge density p (r) of a point charge q at r/. Make
sure that the volume integral of p equals q.

(b) What is the charge density of an electric dipole, consisting of a point charge -q at the
origin and a point charge +q at a?

(c) What is the charge density of a uniform, infinitesimally thin spherical shell of radius R and
total charge Q, centered at the origin? [Beware: the integral over all space must equal Q.]

Y any interest...need by early (9:00 AM) though C

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