A thin stick of length L with uniform charge per unit length lambda occupies the region x=y=0, 0 < H <= z <= H+L above an infinite grounded conducting plane at z=0. Write the following:
a. the charge density for the stick in rectangular coordinates rho(x,y,z) and in cylindrical coordinates rho(s,phi,z),
b. the Dirichlet Green function G((vec(x)), vec(x)') for the region z > 0,
c. an integral expression for the potential in the region z > 0 expressed in rectangular coordinates Phi(x,y,z) and in cylindrical coordinates Phi(s,phi,z).