Please answer this correctly

Computer systems have four major components, operating system being one of them. What are the other three? Please draw an illustration graph to show the possible interaction among all four.

5. In operating systems, each process is represented with a Process Control Block (PCB).

a) Please list the major contents of PCB.

b) Assume there are two processes, P0 and P1, with PCB0 and PCB1. CPU was running on P0 and switches to P1 before switching back to P0. Use a graph to illustrate how this is done.

6. Explain the difference of FCFS CPU Scheduling and RR CPU Scheduling.

7. Including the initial process, how many processes altogether will be created when the following program is executed? Use a graph to illustrate.

#include

#include

int main()

{

// fork a child process

fork();

// fork another child process

fork();

//fork yet another child process

fork();

return 0;

}