Ex. 2.3-On Page 56, we discussed three different ways a process can be created. The third case, in which a currently running process creates a new process, in general covers the first two cases. Explain why. Ex. 2.6- Write a small program that uses fork) and exec) to run the ls command. Ex. 2.9_The amount of time that takes to make a context-switch between threads versus that of between processes is much shorter. Explain why. Ex. 2.3-On Page 56, we discussed three different ways a process can be created. The third case, in which a currently running process creates a new process, in general covers the first two cases. Explain why. Ex. 2.6- Write a small program that uses fork) and exec) to run the ls command. Ex. 2.9_The amount of time that takes to make a context-switch between threads versus that of between processes is much shorter. Explain why