CAS Licensing

Hi,

Hope someone can help me clarify

I have a 2 backup servers running as follow:

- BK01 - CAS + V-Ray => backing up vcenterserver + managing Managed server (BK02)

- BK02 - Managed server => backing up 3 x physical server (3 agents) + BK02 itself

All jobs defined on CAS and one of the jobs is for backing up BK02

Each backup server has its own local storage.

my questions are:

1. Do I need another physical agent for Backup2 on Backup1 CAS?

2. Does Backup server need an agent to backup itself?

Thanks!