Answer:
1.You saw Kim picked the flowers.
(Active Sentence)
Kim picked the flowers.
(Passive Sentence)
The flowers were picked by Kim
(Situation)
2.You classmates are planned to go on camping
(Active Sentence)
My classmates planned to go on camping.
(Passive Sentence)
To go on camping was planned by my classmates
________________________
(Situation)
3.You saw Maria played the piano.
(Active Sentence)
Maria played the piano.
(Passive Sentence)
The piano was played by Maria.