-- sample_dir

    |-- cambridge

    |   `-- security

    |       |-- annex

    |       `-- parking

    |-- history.exe

    |-- markham

    |   |-- annex

    |   |-- building1

    |   `-- parking

    `-- stenton

        |-- admin

        |   `-- accounting

        |       `-- payroll

        |-- gen_ed

        |   `-- Holidays

        `-- lib_arts

            `-- english.txt
上面是目录示意图，问题：

Your current directory is sample_dir. Create a compressed archive of the stenton directory and it's contents, called stenton.tar.gz, and place it in the sample_dir directory. Use a non-verbose tar command with a single option string, including the option to invoke gzip:
你当前目录是sample_dir， 在当前目录下新建一个stenton目录及其内容的压缩文件，文件名为stenton.tar.gz，只能用tar命令简单参数，包括一个支持gzip的参数。
请大家指教，谢谢。