A straight, infinitely long electrical line wire of positive charge per unit length +λ, coincides with the axis of an infinite cylindrical conducting pipe. The pipe has inner and outer radii of R1 and R2, respectively, and carries a positive charge per unit length λ. λ is a positive constant expressed in units of C/m. Determine the electric field expression as a function of λ and r, the distance from the pipe's axis i) r < R1 ii) R1 < r < R2 iii) r > R2.