In order each exercise:
Exercise 1: (root) D (3rd) F (5th) A. / (root) F (3rd) A (5th) C / (root) A (3rd) C (5th) E / (root) E (3rd) G (5th) B
Exercise 2: (5th) G (3rd) E (root) C / (5th) B (3rd) G (root) E / (5th) D (3rd) B (root) G / (5th) C (3rd) A (root) F
Exercise 3: (root) G (3RD) B (5th) D / (root) F (3RD) A (5th) C / (root) C (3RD) E (5th) G / (root) D (3RD) F (5th) A