explain how each of the three cardinal virtue other than justice are exemplified in the individual soul?

Before Socrates discusses these virtues, he explains that the virtues cannot exist unless the city is already "just." Justice hs been taken care of. These virtues begin with wisdom which is shown by those "guardians" who oversee the city and who make sure the city runs as it has been designed to run. The second virtue, courage, is shown by those in the city who have to fight for the city if necessary; he calls them auxiliaries. The final virtue, moderation, is one that is demonstrated by all people in the city; this virtue is not characteristic of just one group such as the guardians or the auxiliaries. It is the virtue shown by those who understand how the city is justly governed and all who practice moderation agree with that decisioon.