Oracle Database 10g Enterprise version supported on Win 2003/Win 2008?

Hi,

The Current version of SAP we are using is SAP R/3 Enterprise 4.7 version (operating system- WINDOW NT )and the database is Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 u2013 Prod

Please help to advice me:

Can currently running version of oracle database be supported on Win 2003/Win 2008?

Can SAP application support the existing oracle database server upgrade to Windows 2003/Win 2008?

Is it possible to have Oracle database separated to other server on SAP DEV and SAP QA?

Many thanks in advance.