An ideal gas with constant specific heats and cv=0.7 kj/kgk and r=0.3 kj/kgk is contained in a piston-cylinder device and undergoes a power cycle as follows: 1-2 isentropic compression from an initial temperature ti=20°c with a compression ratior=5. 2-3 constant pressure heat addition. 3-1 constant volume heat rejection a. sketch the p-v and t-s diagrams for the cycle b. determine the heat and work interactions for each process, in kj/kg c. determine the cycle thermal efficiency.