It started in the American School for the Def in Hartford, Connecticut, which means it is located in the northeast
Desu ne is something you want to tell them that you felt right or after the question you ask (with someone Same age, really friendly with ỏ ưith the person is younger than you)
And Desu ka? Is the word like "right?" Is the Question too. Usually they use to the person you not really friend or the person older than you (formal)
1st one is correct, 2nd one is build to construct, 3rd is correct, 4th is answer to reply, 5th is tell to relate, and 6th is crowd to throng. Hope this helps!
D.. because you can't come to much forward and sound like a mean person and he needs something that will help him/her, not something thats just making them feel bad about what they did wrong
