1. The problem statement, all variables and given/known data Describe what it means for a set to be well defined and then give an example of a well defined set and an example of a set that isn’t well defined. Explain why it is so important for sets used in the real world, for example in marketing research, to be well defined. 2. Relevant equations 3. The attempt at a solution A well defined set is clear without question. I am just unsure of how to use that in real life examples. Same with the one that isn't well defined.