Short answers, pulled from the story.
Duarte Barbosa was a Portuguese explorer and writer born around 1480 who served as an interpreter and clerk for the Portuguese India Armada. He worked under Diogo Barbosa and later became captain of the ship Victoria during Ferdinand Magellan's expedition.
Duarte Barbosa sailed from Seville on the 10th of August 1519 aboard Ferdinand Magellan's fleet alongside João Serrão. This departure marked his participation in the first circumnavigation of the globe after years of service in Asia.
On the 1st of May 1521, Duarte Barbosa attended a banquet ashore near Cebu in the Philippines hosted by Rajah Humabon. He was killed along with many other crew members during this gathering which is known as the massacre at Mactan.
Duarte Barbosa was approximately 41 years old when he died in 1521 based on his birth year of around 1480. His death occurred shortly before the end of the expedition when he was killed during the banquet near Cebu.
Antonio Pigafetta recorded that he blamed Duarte Barbosa directly for the events leading to the massacre while Transylvanus claimed João Serrão mistreated Enrique de Malacca. The historical accounts differ on who was responsible for the plot against the Portuguese crew.