Write a script that takes exactly one argument, a directory name. If the number of arguments is more or less than one, print a usage message. If the argument is not a directory, print another 2message. For the given directory, print the threebiggest files and the threefiles that were most recently modified. Display your script on the terminal using the cat command. Test your scriptusing arguments that cover two user error cases mentioned above. Then run your script with /usr/sbin as the input.