A particle of mass \(m\) is constrained to move along the \(x\)-axis in a region where its potential energy \(U(x)\) varies with position as shown in the graph. Four locations along the \(x\)-axis are labeled \(x_1\), \(x_2\), \(x_3\), and \(x_4\), where \(x_2\) corresponds to a local minimum of \(U(x)\). Which of the following correctly ranks the \(x\)-component of the net conservative force \(F_x\) exerted on the particle at these four positions from greatest to least?