Write 400–600 words for each question that respond to the following questions with your thoughts, ideas, and comments. This will be the foundation for future discussions by your classmates. Be substantive and clear, and use examples to reinforce your ideas for the following questions. 1. Modern computer systems can execute multiple programs concurrently, and this requires the operating system to move programs in and out of memory and the central processing unit (CPU). How does the operating system ensure that a program that is moved out of memory gets it back in the correct state when it is brought back to execution mode? 2. A process can be described as a data structure containing different fields or attributes. What information is stored in a process data structure, and how is that information used by the operating systems? How do processes communicate with each other, even when the processes are in different machines?