7. Which of the following components of program state are shared across threads in a multithreaded process? 1. Register values 2. Heap memory 3. Global variables 4. Stack memory 8. Determine if the following problems exhibit task or data parallelism: 1. Using a separate thread to generate a thumbnail for each photo in a collection 2. Transposing a matrix in parallel 3. A networked application where one thread reads from the network and another writes to the network 4. The Grand Central Dispatch system 9. Consider the following code segment: pid_t pid; pid = fork(); if (pid == 0) { /* child process */ fork(); thread_create ...); fork(); 1. How many unique processes are created? 2. How many unique threads are created