Write a program to take a UNIX command from the command line and fork() a child to execute it. The command can be a simple command like: $ls or $ps, Or it can be a command with options such as $ls -t -l. Use argc and argv[] in the main function to pass parameters. When the child process is executing the command, the parent process simply waits for the termination of the child process. The process id of the parent and the child should be printed out using getpid() and getppid() functions.