PostgreSQL 8.4.1 is supported on RHEL 4 and RHEL 5.2

Dear All,

Kindly clarify that whether PostgreSQL 8.4.1 is supported on RHEL 4 and RHEL 5.2, and what type of installation binaries are available ( RPM etc) for it.
Also can I upgrade the Postgresql 7.4.6-1 to PostgreSQL 8.4.1.

Regards,
Utsav Turray
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