Q: First introduced in 1939, what "law" states "in a hierarchy every employee tends to rise to their level of incompetence", with the corollaries that "in time, every post tends to be occupied by an employee who is incompetent to carry out their duties"
A: peter principle

Q: Arundel Castle in Sussex is the family seat of which Dukes?
A: dukes of norfolk

Q: How many American states begin with the letter A ?
A:
4