Explain the differences between partitions and layers.

1.What are the advantages of packaging the classes?
2.Explain the differences between partitions and layers. Be sure your postings are substantial.
3.What criterion is used to cluster classes together into a single package? Be sure your postings are substantial.
Need to do three questions then answer them right underneath the question.
Discuss the Rational Software Architect (RSA) iLab assignments and techniques. Please post any UML modeling questions or hints and tips that you have concerning this week’s RSA modeling lab.
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Added on 27.11.2015 20:18
Here is an example of what I would like it to be.