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## Homework Statement

A solid isolated sphere with radius R has a non uniform charge which is given by ρ= Ar²,

with A a constant and r<R measured from the centre of the sphere

## Homework Equations

(a) Show that the electric field outside the sphere is equal to E = (AR

^{5})/(5ε

_{0}r²)

(b) Show that the electric field inside the sphere is equal to E = (AR

^{3})/5ε

_{0})

## The Attempt at a Solution

No attempt, I am completely clueless about what to do here.

Pardon my english, not a native speaker.