Two long, straight, perpendicular wires lie in the xy-plane along the x-axis and y-axis. Each wire carries an electric current of equal magnitude \(I\), with current flowing in the \(+x\)-direction along the x-axis and in the \(+y\)-direction along the y-axis. Four points—\(P\), \(Q\), \(R\), and \(S\)—are located in the four quadrants, each at a distance \(d\) from both wires, as shown in the figure. Which of the following correctly ranks the magnitude of the net magnetic field \(B\) at these four points?