Q2. Describe three general methods used to pass parameters to the operating system during system calls.(10pts) Q3. Name and describe the different states that a process can exist in at any given time. (10pts) Q4. Explain the concept of a context switch. (10pts) Q5. Explain the main differences between a short-term and long-term scheduler. (10pts) Q6. Describe the relationship between an API, the system-call interface, and the operating system. (10pts) Q7. Visually Represent process scheduling. Then explain this process in details. (15pts) 28. Explain in details the IPC models and compare between them. (15pts)