A very thin ring of radius carries a positive charge uniformly distributed on it. The ring lies in the - plane with its center at the origin. A short uniformly charged rod of length with an identical positive charge is located along at and oriented in the -direction with one end at and the other end at . Both the ring and the rod are insulators, and the charges are fixed in place. For the system consisting of the rod and the ring, find the magnitude and direction of the electric field at the point . Express your symbolic answer in terms of , , , , hati for , hatj for , and hatk for as needed. [Recall that .]