List references where needed 1. Describe the difference between a process and a thread 2. Which of the following components of program are shared across threads in a multithreaded process ? a. Register values b. Heap memory c. Global variables d. Stack memory 3. What is a spinlock? What is an alternative to using spinlocks? 4. What is the distinction between the critical section and the critical data? 5. Describe the difference between a monitor and a semaphore