please solve with detailed steps

4) A closed system initially at P1=5 bar and V1=0.3m3 undergoes the following reversible processes: i.) (12) Expansion along the path PV2= constant until 0.4m3 ii.) (23) Isochoric heating until 5 bar iii.) (34) Compression to a volume of 0.5m3 along the linear path P=1935V iv.) (45) Isobaric compression to 0.3m3 v.) (51) Isochoric heating to initial state a. Determine P2 and P4. b. Sketch the process on a PV diagram, labeling all points and indicate the direction of each process. Highlight the region that represents the work, and based only on this diagram, state whether the cycle produces work or requires work c. Determine the net boundary work, Wb,net