Plato on Justice

Using Book One of the Republic , complete the assignment detailed below.

I want you to present a simple outline of the definitions of justice given in Book 1 of the Republic and show how Socrates refutes (overturns) each of those definitions.  You need not write a detailed essay here; all I am looking for are the main points.  Feel free to restate the arguments in your own words.

Here is an example of how you might present this outline:
I. A.  Definition One (Cephalus):  Justice is to speak the truth and pay your debts
I. B.  Refutation:  It is not just to repay a debt if in doing so you cause harm to others, such as returning a weapon to a person who is insane and who might use it to murder someone.
Get the idea?
BEWARE: There are at least 14 definitions and refutations, so I expect you to give at least 10 to 12 definitions and refutations

Link to the book: http://classics.mit.edu/Plato/republic.2.i.html