Answer the following questions:

1. Subsets vs. Proper Subsets:In your own words, pleasemake 3 observations about thesimilarities and differences in meaning between these symbols:"less than, less than or equal to, subset, proper subset".

2.Null Set:Explain in your own words why the null set is a subset of every set.

3. Set Operations:Give an example of sets A and B such that their union is equal to B and their intersection is equal to A.What must be the relationship between A and B in order to make this happen?