Papua New Guinea was Australian territory.

No, Papua New Guinea is in the Pacific. It is the country on the eastern half of the island of New Guinea, although it is sometimes called New Guinea for short. The western half of New Guinea is Indonesian territory. Papua New Guine and New Guinea are completely different to the country of Guinea (officially the 'Republic of Guinea') in west Africa.

No. Papua New Guinea was once a territory of Australia. It is now a country in its own right, having achieved full independence on 16 September 1975. It does not belong to Asia.

The western, Indonesian half of the island known as New Guinea is Papua Barat (West Papua). 2 provinces in that area is Papua Province and Papua Barat Province.

No. None of the stars on the Australian glag symbolise Papua New Guinea, because PNG is not a territory of Australia any more - nor was it a territory when the flag was originally designed.