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: if i can keep the book and both balls, you can have all 3 hats.  YOU: i need the balls they are worth 10 to me  THEM: i can't part with both. how about we each get one ball?  YOU: ok that works, i will take 1 ball and 2 hats?  THEM: okay, that's agreeable.
Student:
Yes