In this homework, you are to gain some familiarity with the process management APIs about which you just read. Don't worry - it's even more fun than it sounds! You'll in general be much better off if you find as much time as you can to write some code, so why not start now? 6. Write a slight modification of the previous program, this time us- ing waitpid() instead of wait(). When would waitpid () be useful? 7. Write a program that creates a child process, and then in the child closes standard output (STDOUT_FILENO). What happens if the child calls printf() to print some output after closing the descriptor? 8. Write a program that creates two children, and connects the stan- dard output of one to the standard input of the other, using the pipe () system call