A heat engine produces 40 kW of power while consuming 40 kW of heat from a source

Question:

A heat engine produces 40 kW of power while consuming 40 kW of heat from a source at 1200 K, 50 kW of heat from a source at 1500 K, and rejecting the waste heat to the atmosphere at 300 K. Determine
(a) The reversible power and
(b) the rate of energy destruction (I) in the engine's universe.