Solve the below problem:
Q: An air-standard cycle is executed in a closed system with 0.004 kg of air and consists of the following three processes:
1-2 Isentropic compression from 100 kPa and 27°C to 1 MPa
2-3 P = constant heat addition in the amount of 2.76 kJ
3-1 P = c1v + c2 heat rejection to initial state (c1 and c2 are constants)
(a) Show the cycle on P-v and T-s diagrams.
(b) Calculate the heat rejected.
(c) Determine the thermal efficiency.
Assume constant specific heats at room temperature.