Question 4 5 pts A Set can have duplicate elements. O True O False Question 5 5 pts A Queue can have duplicate elements. True O False Question 6 5 pts A Queue can be used to implement a line in a store. If George, Judy, John, and Paula get in line and the cashier checks out two customers. Who is the person in line that would be checked out next? (This is a so-called "peek" operation on queues). Return John, and remove him from the line. Return John Return John and Paula