Add new file to existing 7z archive, but place it in a subfolder

I have 7z archive that looks like this

archive.7z
/
 -Folder1
   file1
 -Folder2
   file2

I know that I can add file3 to the root by

7za.exe a archive.7z file3

But I want to add file3 in Folder2. How to do that?

>Solution :

Answered here: https://superuser.com/questions/238399/how-to-specify-relative-path-in-7-zip-command-line/1097301

You can create directory structure similar to archive one and compress it with required file inside