Please help with Griffiths Intro to Electro. Problem 3.41!!

[nops77]

I'm having much trouble with problem 3.41 in Griffiths intro to Electrodynamics...

[Tide]

You may be surprised to learn that not everyone reading and participating in this forum has a copy of Griffiths! :-)

Also, you should be posting in the homework section.

[neutrino]

Isn't there a set of hints of provided for you to solve the problem?