What are the roles of the judge and the jury? How are the two roles similar and how are they different?

Who among the two is more important in a trial process? Why?

Explain the education, training, and selection processes for a judge. Do these processes alone make the judges the most important figures in the courtroom?

Considering that some judges are elected, others are appointed, and some are chosen on the basis of merit, is justice inside the courtroom affected by the type of judicial selection?

Support your positions on the above with references from your library research.