Understanding Radial Flow in Porous Media: Darcy's Law and Pressure Distribution

[cruckshank]

I've never done a question similar to this one, and I've found myself stuck on it for a while now. I was hoping for some guidance on where to begin, because I truly have no idea:

An incompressible fluid flows through a porous cylindrical shell with inner and outer radii R₁ and R₂, respectively under steady state conditions. At these surfaces, the pressures are known to be p₁ and p₂ respectively. The length of the cylindrical shell is h.
(See diagram)

Find:
A) Pressure distribution
B) Radial flow velocity
C) Mass flowrate

(Hint: For the flow of a steady state incompressible fluid through porous media, the equations of continuity in the cylindrical coordinates (r,Θ,z) are expressed by d/dr(rq) = 0 in which q is the Darcy velocity).

 

[Chestermiller]

You should also be warned for no effort. Please write down Darcy's law in cylindrical coordinates for a purely radial flow.