I'm not sure of 3 and 5 sorry
Because it is one of the finest Philippine pre-colonial artworks ever produced and is considered a masterpiece of Philippine ceramics. It is listed as a national treasure and designated as item 64-MO-74 by the National Museum of the Philippines.
Year: 890-710 BCE
It was found in the cave of Manunggul, a burial site during the Neolithic period. Manunggul is with the important group of Tabon caves at Lipuun Point, Palawan. The jar is believed to be used for the secondary burial, in which the bones of the deceased are placed inside, but the jar is no longer buried. The jar is made of clay and sand, and it has a cover design similar to the waves of the sea. The body of Tabon Man was also discovered near Banga ng Manunggul.
The design and shape of the Manunggul Banga are truly unique, and it is considered to have shaped it well. This proves that there was a belief in the afterlife, or life after death, of the first people in the Philippines.