Can you name this important group

1
Can you name this important group?
2
This group can overrule both federal and state
laws.
3
This group helps interpret the Constitution.
4
It acts as a referee.
5
This group banned racial segregation in public
schools in 1954.
6
This group is made up of nine Justices.
7
There are no official qualifications for members
other than they must know the law.
8
The United States Supreme Court