[Sloth]

the teacher said that the Gospels were written by the early Church community probably between the years 200 and 300

Foolish. The author of Luke, who also wrote Acts, was personally present for some of the events portrayed (e.g., Acts 16:13 -- "And on the Sabbath day we went out of the city to the riverside, where prayer was customarily made; and we sat down and spoke to the women who met there."

[Salvation]

Luke rarely uses "we" in his narravtive in Acts. Usually "we" was used in references to boating and surviving storms.

Luke ususally writes in the third person.

But I agree that he was there for some of the incidents in Acts. Just wanted to point out that the "we" was a kind of writing with a history for that day.