A sample of gas is taken through the cycle shown. In the process a b, the pressure follows p = 50 V (SE units). In process abc, 720 kJ of heat are added to gas: 25+ P (kPa) 15 10. 5 O a 30.0 40.0 10.0 20,0 V(m) a) Find the work done by the gas in pressure ab, and in process b c, b) Find the change in internal energy AEint for process abc c) How much heat is added to the gas in one complete cycle?