Consider the non-uniform charge distribution ρ(r) = ρ0r/R of an infinitely long cylinder of radius R . What is the electric force on a point charge q located at r where r < R? (Attention: Be sure to mark the correct answer. If you mark a wrong answer you will lose 20% of the pt.) a) qρ0ϵ0 r b) qρ02ϵ0 r c) qρ03ϵ0 Rr2 d) qρ02ϵ0 Rr2 e) qρ03ϵ0 Rr3