1 - They wanted us to see inside of the Babylonian society, and to see what it was like for those people back then.
2 - We learn that most punishments are harsh, and seem fair enough
3 - The most common punishment is Death and body parts being cut off
4 - No, One law is for farmers, another is for physicians.
5 - No, You will get punished the same even if it was an accident.
I hope this helped! ( I remember doing this in 5 grade XD )