please I need accurate answers this is operating system class.

1-What are the five states that a process can be? What is the difference between processes waiting in the "ready queue" versus processes waiting in the "waiting" queue?

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2-Describe how process control block is used in context switches.

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3- Suppose a process was running and its time slice has just expired. Which queue does it immediately enter? When will it run again?

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4- In the following code snippet, which part of the code (referred to as X and Y code) corresponds to the parent process code, and which one corresponds to the child process code?

if (fork()) { // X code } else { // Y code }

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5- What is the purpose of exec() system calls in relation to fork() system call? What are the different arguments of the excelp() system call take?

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