Three identical particles of mass m are mounted on a massless rigid link at a distance apart, as sketched in the figure below. The link is pivoted about point (). The middle particle is restrained by a spring of stiffness k& and dashpot of dashpot constant , which connect this particle to a massless follower that slides without friction along a vertical slot (thus maintaining a horizontal orientation of the spring and the dashpot). The spring is unstretched when the link is in its vertical equilibrium orientation. Note that gravity acts. Derive the equations of motion for the system. Massless follower