The figure shows equipotential isolines in a region of space with potentials labeled as 10 V, 20 V, 30 V, and 40 V. At Point P on the 30 V line, the isolines are vertical and separated by a horizontal distance d, with the 20 V line to the left and the 40 V line to the right. At Point Q on the 20 V line, the isolines are horizontal and separated by a vertical distance 2d, with the 10 V line above and the 30 V line below. Which of the following diagrams best represents the direction and relative magnitude of the electric field vectors, \(\vec{E}_P\) and \(\vec{E}_Q\), at points P and Q?