Which of the following statments are the correct way to call the method Issue() defined in the code snippet given below? namespace College { namespace Lib { class Book { public void Issue() { // Implementation code } } class Journal { publ

Which of the following statments are the correct way to call the method Issue() defined in the code snippet given below?

namespace College
{
namespace Lib
{
class Book
{
public void Issue()
{
// Implementation code
}
}
class Journal
{
public void Issue()
{
// Implementation code
}
}
}
}

1 College.Lib.Book b = new College.Lib.Book();
b.Issue();

2 Book b = new Book();
b.Issue();

3 using College.Lib;
Book b = new Book();
b.Issue();

4 using College;
Lib.Book b = new Lib.Book();
b.Issue();

5 using College.Lib.Book;
Book b = new Book();
b.Issue();