Question

What are the three views about justice as written by Plato?

Answer 1

Answer;
The three are;
1.justices is plainly giving back what is deserved. 
2. justices is interest of "strong,, governing parties". 
3. "it is social necessity weak, but not valuable once one becomes strong."

Explanation; 
According to Plato, justice does not depend upon a chance, convention or upon external force. It is the right condition of the human soul by the very nature of man when seen in the fullness of his environment.He criticized strongly the conventional ideas of Justice presented differently by Cephalus, Polymarchus, Thrasymachus and Glaucon, and gave his own theory of justice. 

Answer 2

That :
1- justice is plainly giving back what is deserved 
2- justice is the interest of "strong, governing parties"
3- "it is a social necessity for the weak, but not valuable once one becomes strong"

the book, the republic by plato may help you find where he claims this stuff
ps where there is quotes you should rewrite in your own words