2. Recall the state transition diagram used by OSs to model process behavior. a) Explain why is there no queue used for the Run state? (5) b) Choose one of the missing transitions and explain why it cannot exist. (5) c) What event would cause a process to move from the run to ready state? (5) 3. When a process forks into a parent process and a child process, how would the 2 resulting processes determine which one is which? (5) 4. Describe the concept behind execution modes with respect to a CPU. (10) 5. List the 4 regions of memory made available to a running process by the OS