Design a class called Writer, which is designed to model a book's writer. It contains:

• Three private instance variables: name(String), email(String), and gender(char of either 'm' or 'f');
• One constructor to initialize the name, email and gender with the given values;

public Writer(String name, String email,char gender) {......}

• public getters/setters: getName(), getEmail(), setEmail(), and getGender();

(There are no setters for name and gender, as these attributes cannot be changed.)

• A toString() method that returns "Writer[name=?,email=?,gender=?]", e.g., "Writer[name=Girdhar Gopal,[email protected],gender=m]".

Also, design a class called Book to model a book written by one writer. It contains:

• Four private instance variables: name(String), writers(an array of the class Writer you have just created, assume that a book can have any number of writers), price(double), and qty(int);
• Two constructors:

publicBook (String name, Writer[] writer,double price) { ...... }
publicBook (String name, Writer[] writer,double price,int qty) { ...... }

• public methods getName(), getPrice(), setPrice(), getQty(), setQty().
• A toString() that returns "Book[name=?,Writers={Writer[name=?,email=?,gender=?],........},price=?,qty=?". You should reuse Writer’s toString().

class Writer
{
  private String name;
  private String email;
  private char gender;
  public Writer(String name,String email,char gender)
  {
    this.name=name;
    this.email=email;
    this.gender=gender;
  }
  public String getName()
  {
    return name;
  }
  public String getEmail()
  {
    return email;
  }
  public void setEmail(String email)
  {
    this.email=email;
  }
  public char getGender()
  {
    return gender;
  }
  public String toString()
  {
    return "Writer[name="+name+",email="+email+",gender="+gender+"]";
  }
}

class Book
{
  private String name;
  private Writer[]writers;
  private double price;
  private int qty;
  public Book(String name,Writer[]writers,double price)
  {
    this.name=name;
    this.writers=writers;
    this.price=price;
  }
  public Book(String name,Writer[]writers,double price,int qty)
  {
    this.name=name;
    this.writers=writers;
    this.price=price;
    this.qty=qty;
  }
  public String getName()
  {
    return name;
  }
  public double getPrice()
  {
    return price;
  }
  public void setPrice(double price)
  {
    this.price=price;
  }
  public int getQty()
  {
    return qty;
  }
  public void setQty(int qty)
  {
    this.qty=qty;
  }
  public String toString()
  {
    StringBuilder sb=new StringBuilder();
    sb.append("{");
    for(int i=0;i<writers.length;i++)
    {
      sb.append(writers[i].toString());
      if(i<writers.length-1)
      {
        sb.append(",");
      }
    }
    sb.append("}");
    return "Book[name="+name+",Writers="+sb.toString()+",price="+price+",qty="+qty;
  }
}