Air in a piston-cylinder assembly and modeled as an ideal gas undergoes two internally reversible processes in series from state 1, where T1 = 290 K, p1 = 1 bar. Process 1-2: Compression to p2 = 5 bar during which pV1.9 = constant. Process 2-3: Isentropic expansion to p3 = 1 bar. Sketch the two processes in series on T-s coordinates. Determine the temperature at state 2, in K. Determine the net work, in kJ/kg.