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I. As the picture shows a certain amount of ideal gas performs the following a), b), c) and d) cycles. P1,V1,T1 and f parameters are known. The gas is diatotnic (f=5) and the P1V1 product is assumed to be 1 joule. Determine the thermal efficiency , the aborbed heat QIN and the net mechanical Work WNet for two arbitrarily chosen cycles bellow. II. Determine the entropy changes S23 for process 23 of cycle b ) III. A certain amount of monoatomic ideal gas (f=3) performs such a process which can be expressed by the following mathematical expression: P(V)=(V02P0)V2, where P0,V0 are known parameteres. Determine V(T),U(V) and S(T) functions