Checking current ESS/MSS Business package version

Hi,

I have currently started working on Phase 2 of a project, and wanted to check the ESS/MSS Business Package versions that have been installed by a prior team. Plz let me know how I can check that.

Is System Administration role in the Portal sufficient to check the current version of the ESS/MSS business package running in the system, or do I need to do anything from the Basis side?

Appreciate the help!

Cheers!