The author of the article points out that the Beatles remained popular after Brian Epstein's death to explain
(1)
why the Beatles broke up after 1967
(2)
that Epstein was not solely responsible for the Beatles' success
(3)
that Epstein had prevented the Beatles from becoming popular
(4)
the major effect upon the Beatles' music after 1967
(5)
how the Beatles changed their image after 1967