Which of the following statements are correct about the structure declaration given below?

 struct Book
 {   
     private String name;  
     protected int totalpages;     
     public Single price;      
     public void Showdata()    
     {
         Console.WriteLine(name + " " + totalpages + " " + price);    
     }      
     Book()     
     {    
         name = " ";     
         totalpages = 0;      
         price = 0.0f;     
     } 
 } 
 Book b = new Book();

1. We cannot declare the access modifier of totalpages as protected.
2. We cannot declare the access modifier of name as private.
3. We cannot define a zero-argument constructor inside a structure.
4. We cannot declare the access modifier of price as public.
5. We can define a Showdata() method inside a structure.