Teacher:Given a negotiation between two participants, answer 'Yes' if both participants agree to the deal, otherwise answer 'No'.
Teacher: Now, understand the problem? Solve this instance: THEM: how about i have the book, 1 hat, and 1 ball. you get everything else?  YOU: well you can have the balls because they're not worth anything for me but i would like the book and 1 hat. or conversely all the hats and you can have the book  THEM: ok, you can have the hats. i'll take the book and balls?  YOU: sounds good to me.
Student:
Yes