DLP Up gradation from 11.6 to 12.0/12.5

Hi All,

DLP Upgradation from 11.6 to 12.0/12.5.

1) I have a licence key for DLP 11.6 & I am searching source to download upgraded version from fileconnect but it shows only older versions like Symantec_DLP_11.1.2_ReleaseUpdate_Win-IN.zip so from where can i download the New version i.e 12.0/12.5 or why it is not showing on fileconnect?

2) Do i need to upgrade oracle also? my current oracle version is 11.2.0.1

3) Please provide me upgrade document (from 11.6 to 12.0/12.5)

4) what about DLP Agents, will it automatically upgrade if not then how to upgrade agents?

Thanks in advance..