What amendment provides the right to a grand jury?

What amendment provides the right to a grand jury?
 
  a. Third Amendment.
  b. Fourth Amendment.
  c. Fifth Amendment.
  d. Sixth Amendment.
  e. First Amendment

Question -2-

Which group of the following groups of amendments form the zone of privacy within which the right to privacy may exist?
 
  a. the First, Third, Fourth, Fifth, and Ninth
  b. the Tenth, Eleventh, and Nineteenth
  c. the Thirteenth, Fifteenth, and Seventeenth
  d. the Twentieth, Twenty-third, and Thirtieth
  e. the Third, Fifth, Sixth and Tenth.

Question -3-

The Fourth Amendment was extended to the states in the case of
 
  a. Palko v. Connecticut.
  b. Mapp v. Ohio.
  c. Weeks v. United States.
  d. United States v. Leon.
  e. Weeks v. United States