someone with a membership that can answer this question about electric fields, please Urgent!

A long, nonconducting, solid cylinder of radius R has a nonuniform volume charge density ρ that is a function of radial distance r from the cylinder axis: ρ = Ar². Where A is a constant with the appropriate units. What is the magnitude of the electric field at radius r where (a)r < R and (b)r > R. State your answers in terms of the given variables, using ε₀ when needed.