The values of making a sacrifice shows that you are selfless and will put others before yourself.
so all you have to do for the first one is write about someone that happened to you in the past or if you are speaking 3rd person/2nd/person/1st person write about it like that. and for the second one just write tiny affirmations or whatever
Arnold is trying to understand the disagreement that occurs between Mr. and Mrs. Van Daan with regards the Mrs. Van Daan's fur coat. Which identifies the most useful question for Arnold to ask?