A uniform horizontal beam of length \(L\) and mass \(M\) is supported at its two ends by vertical pillars at \(x = 0\) and \(x = L\). A worker of mass \(m\) walks along the beam from \(x = 0\) to \(x = L\). In each graph, the solid curve represents the magnitude of the normal force \(F_1\) exerted by the pillar at \(x = 0\), and the dashed curve represents the magnitude of the normal force \(F_2\) exerted by the pillar at \(x = L\). Which of the following graphs best represents \(F_1\) and \(F_2\) as functions of the worker's position \(x\)?