4. An ideal gas (Cv 2kJ/kgK, Mr-8.315kg/kmol) undergoes the following processes A. 1-2: B. 2-3: C. 3-4: D. 4-1: Adiabatic compression. Constant pressure heating. Adiabatic expansion. Constant pressure cooling. P1-1bar, T1-300K, P2-10bar, q23-1250kJ/kg. Calculate (a) T2, T3 and T4, (b) All technical works exchanged, (c) All heats exchanged, (d) the thermal efficiency of the thermodynamic cycle. Considering that the direction of the cycle is changed (from clockwise to anti- clockwise), calculate (e) All technical works exchanged, (f) All heats exchanged, (g) the Coefficient of Performance (both modes) For both cycles (clockwise to anti-clockwise operation), confirm that the cycles do not violate 2nd law of Thermodynamics. For both cycles (clockwise to anti-clockwise operation), create the P-V, P-T and V-T diagrams.