using System;
using System.Collections.Generic;
using System.Text;

namespace A2_
{
class Book
{
   // private attributes:
   private int catalogNumber; // â€“ bookâ€™s catalog number
   private string title;    // â€“ bookâ€™s title
   private string authors; // â€“ bookâ€™s authors
   private Customer c;    // - reference to the customer to who
   // the book is issued, if at all.

   // public properties:
   // Read-only property for catalogNumber
   public int CatalogNumber
   {
         get => catalogNumber;
   }
   // Constructor:

   /// <summary>
   /// â€“ constructor that initializes the
   /// title, author and catalog number attributes to the values passed.
   /// </summary>
   /// <param name="title"></param>
   /// <param name="authors"></param>
   /// <param name="catalogNo"></param>
   public Book(string title, string authors, int catalogNo)
   {
         this.title = title;
         this.authors = authors;
         this.catalogNumber = catalogNo;
         c = null;
   }

   /// <summary>
   /// constructor that does not take any parameters and initializes
   /// the attributes to their default values.
   /// </summary>
   public Book()
   {
         this.title = "";
         this.authors = "";
         this.catalogNumber = 0;
         c = null;
   }

Problem 1: Write a program that reads ten integer numbers from the...