SSC JE Mechanical Engineering 2018 Set 2 Paper

A reversible engine operates between temperature ${\mathit{T}}_1$ and ${\mathit{T}}_2$ . The energy rejected by this engine acts as an input for another reversible engine at temperature ${\mathit{T}}_2$ , which rejects to a reservoir at temperature ${\mathit{T}}_3$ . What is the relation between ${\mathit{T}}_1$ , ${\mathit{T}}_2$ and ${\mathit{T}}_3$ ?