2. (30pts) Write a simple sequence-number system through which three concurrent processes, P1, P2, and P3 each obtain unique integers in the range [1, 500]. Use the fork0 call to create P, P2, and P3. Given a file, F, containing a single number, each process must perform the following steps a. Open F b. Read the sequence number N from the file c. Close F d. Output N and the process' PID (either on screen or test file) e. Increment N by 1 f. Open F g. Write N to F h. Close F Describe the behavior of your program and explore the reason for this behavior. Provide evidence for your conclusion in form of test-output. You must clearly document your code. 2. (30pts) Write a simple sequence-number system through which three concurrent processes, P1, P2, and P3 each obtain unique integers in the range [1, 500]. Use the fork0 call to create P, P2, and P3. Given a file, F, containing a single number, each process must perform the following steps a. Open F b. Read the sequence number N from the file c. Close F d. Output N and the process' PID (either on screen or test file) e. Increment N by 1 f. Open F g. Write N to F h. Close F Describe the behavior of your program and explore the reason for this behavior. Provide evidence for your conclusion in form of test-output. You must clearly document your code