Upgrading R12.1.1 to R12.1.3 with database to 11.2.0.3

 Hi,

We are planning to upgrade R12.1.1 to R12.1.3 with database 11.1.0.7 to 11.2.0.3. Kindly advise me that what are the component should also be upgraded to have the stable system. For example is it mandatory to upgrade the below:

1. Upgrade OracleAS 10g Release 3 (10.1.3)
2. Upgrade to OracleAS 10g 10.1.3.4 or OracleAS 10g 10.1.3.5 before applying the Release 12.1.1
Maintenance Pack.
3. Upgrade OracleAS 10g Release (10.1.2) for Forms and Reports to Patchset 3 (10.1.2.3)
4. Upgrade Oracle E-Business Suite Release 12 JDK to Java 6.0 latest update

Thanks in Advance.

Ausaf