Supreme Court Justices

Facts:

1. President Bush nominated John G. Roberts, Jr., as Chief Justice, and took his seat on September 29, 2005.
2. Antonin Scalia was appointed Judge of the United States Court of Appeals for the District of Columbia circuit in 1982.
3. From 1965 to 1988, Anthony Kennedy was a Professor of Constitutional Law at the McGeorge School of Law, University of the Pacific.
4. Ruth Bader Ginsburg was instrumental in launching the Women's Rights Project of the American Civil Liberties Union.
5. From 1980-1990, Stephen Breyer served as a Judge of the United States Court of Appeals for the First Circuit, and as its Chief Judge, 1990-1994.
6. President Barack Obama nominated Sonia Sotomayor as an Associate Justice of the Supreme Court on May 26, 2009, and she took assumed this role August 8, 2009.
7. From 1995-1999, Elena Kagan was associate counsel to President Clinton and then served as deputy assistant to the President for Domestic Policy and Deputy Director of the Domestic Policy Counsel.
8. How long does it usually take from the time a Justice is nominated until they actually assume their role?
9. What credentials do these people need to be appointed Justices?
10. Kagan Served as a law clerk to Justice Thurgood Marshall during the 1987 term.