Given Deque userName with elements $["$Len$",$ "Bill", "Amy"$],$ what is output?

System.out.println$($userName$.$getFirst$())$;

System.out.println$($userName$.$pollFirst$())$;

System.out.println$($userName$.$pollFirst$())$;

Question $19$ options:

Len

Len

Len

Len

Bill

Bill

Len

Bill

Amy

Len

Len

Bill