Agas contained within a piston cylinder assembly undergoes two processes a and b between states 1 and 2. p1=10 bar, v1= 0.1m^3, u1=400kj, p2=1 bar, v2=1.0 m^3, u2= 200kj. pv= constant in process a. constant volume process followed by a constant pressure process in process b. for each process, sketch the pv diagram and evaluate w12 and q12 associated with each process in kj.