A spring mass system is held at rest at height H from the ground with the spring in relaxed state. Find the minimum value of ‘H’ so that the system has a tendency to rebound after hitting the ground. (Here mass${\text{'m}}_{\text{2}}\text{'}$ is stick with ground after collision i.e., between${\text{m}}_{\text{2}}$  and ground perfect inelastic collision)