A line charge of linear charge density with the shape of a square of side L

Question:

A line charge of linear charge density λ with the shape of a square of side L lies in the yz plane with its center at the origin. Find the electric field on the x axis at an arbitrary distance x, and compare your result to that for the field on the axis of a charged ring of radius r = ½L with its center at the origin and carrying the same total charge.