A young man is sitting next to the ornate building wall with the backpack on the ground and hiding his face in his hands .
It is unlikely that a student is exhausted as he sits next to a wall with his backpack at his feet .
It is probable that a student is exhausted as he sits next to a wall with his backpack at his feet .
It is unlikely that a student is exhausted as he sits next to a wall with his backpack at his feet .
A student is exhausted as he sits next to a wall with his backpack at his feet .