Answer to Question 1
(3:023:39) Section I : A B :
Section II C1 D C2 D
Section III E B
(3:394:20) After a brief drum sound at 3:39 the entire song repeats.
Rounded binary form
Answer to Question 2
Agbekor Song 1 : A1 A2 : B B A2 = A B A, ternary. Scale: E F F G B C (1 b2 2 b3 5 b6)
Agbekor Song 2 : A1 B1 A2 B2 : = A B, binary. Scale: E G A B D (E) (song has 5 pitches with no steps)
Agbekor Song 3 : A1 A2 :: B1 B2 : A2 = A B A, ternary. Scale: (E) G A B D (E) (same scale as Song 2)
(In Agbekor Song 3, since at the end only A2 returns and A1 does not return, you may also think of the overall form as rounded binary, that is, basically a two-part binary form with limited reference to the opening material at the end.)