Question: Recall the problem posed at the beginning of this chapter: Your company has developed a program for use on a small parallel processing machine. According to the technical documentation, the program executes processes P1, P2, and P3 in parallel; these processes all need results from process P4, so they must wait for Process P4 to complete execution before they begin. Processes P7 and P10 execute in parallel but must wait until Processes P1, P2, and P3 have finished. Process P4 requires results from P5 and P6 before it can begin execution. P5 and P6 execute in parallel. Processes P8 and P11 execute in parallel but P8 must wait for Process P7 to complete, and Process P11 must wait for P10 to complete. Process P9 must wait for results from P8 and P11. You have been assigned to convert the software for use on a single processor machine.