Using the 7zip command line, how do I create a folder in the archive?

I have an archive called "archive.7z" and it's completely empty.
Using the command line, I'd like to create folders inside the archive.
And create folders in those folders.
I know it can be done using the GUI (Graphic User Interface) version but I need to be
able to do it from the command line version. Any idea how? Also on a separate note,

I'd also like to know how to add a file, perhaps a text file located on my D:\ drive into one of the folders inside of the folders. Any help would be appreciated. If you can, please keep it simple and maybe give an example. I'm experienced with compression programs but I have Autism and sometimes have difficulty understanding things. -Thanks in advance. :)