Positive charge Q is distributed uniformly along a thin plastic rod that forms one quarter of a circle in the third quadrant of the x-y plane. The circle has radius a and its center is at the origin.
1. What is the x-component of the resulting electric field at the origin? Express your answer in terms of the variables Q, a and appropriate constants.
2. What is the y-component of the resulting electric field at the origin? Express your answer in terms of the variables Q, a and appropriate constants.