16. Summarise the various priority_queue member functions used in C++. 17. What is a set? Explain how a set class is accomplished in STL. 18. Explain the various set member functions used in C++. 19....

16. Summarise the various priority_queue member functions used in C++.

17. What is a set? Explain how a set class is accomplished in STL.

18. Explain the various set member functions used in C++.

19. What is a multiset? Explain how a multiset associative container is used in C++.

20. Elucidate the various multiset member functions used in STL.