Which points on the potential energy diagram represent the eclipsed conformation of ethane and staggered conformation of propane respectively?

Propane has more conformational energy as compared to ethane. Eclipsed conformation of ethane has more van der Waal's strain and torsional strain, so it lies to upper side in the P.E. diagram and staggered conformation of propane has less van der Waal's strain and torsional strain, so it lies to lower side in the P.E. diagram