A straight wire of length L has a positive charge Qdistributed along its length. Find the magnitude of the electric field due to the wire at a point located a distance d from one end of the wire along the line extending from the wire . Find

Enet, the magnitude of the electric field at point P due to the total charge.
Express your answer in terms of some or all of the variables Q, L, and d, and the constants ? and ?0.
From what I have done so far the answer does include ?0.