engine / thermo question?

Question

A heat engine using a diatomic gas follows the cycle shown in the figure. Its temperature at point 1 is 20.0 C.

Figure has a triangle with coordinates: 1=(10, 0.5), 2=(40, 1.5), 3=(40, 0.5)
The cycle starts with 1 and ends at 3.

What is the power output of the engine if it runs 100 rpm?

What is the thermal efficiency of this heat engine?

Answer 1

Please supply the diagram of the engine cycle.