I need help with question #8 (Scanned and attached from text book). Also include

Question

I need help with question #8 (Scanned and attached from text book). Also included is question 7 because 8 adds onto work done on a classes (called person.java and customer.java(attached)) in Question 7.

 class Person{        //fields        private String person_name;        private String person_address;        private String person_telnum;        //constructor        public Person(String person_name,                        String person_address,                        String person_telnum)        {                setName (person_name);                setAddress (person_address);                setTelephoneNumber (person_telnum);        }        //accessors functions        //Returns name of person        public String getName()        {                return person_name;        }        //Returns address of person        public String getAddress()        {                return person_address;        }        //Returns telephone number of person        public String getTelephoneNumber()        {                return person_telnum;        }        //mutator functions        //sets name of person        public void setName(String n)        {                person_name = n;        }        //sets address of person        public void setAddress(String a)        {                person_address = a;        }        //sets telephone number of person        public void setTelephoneNumber(String n)        {                person_telnum = n;        }}

 class Customer extends Person{        //fields        private int cust_number;        private boolean cust_mailinglist;        // constructor        public Customer(String person_name,                        String person_address,                        String person_telnum,                        int cust_number, boolean mailinglist)        {                super (person_name, person_address, person_telnum);                setCusNumber (cust_number);                setMailList (mailinglist);        }        //accessor functions        //returns customer ID        public int getCusNumber()        {                return cust_number;        }        //returns mail list status        public boolean getMailList()        {                return cust_mailinglist;        }        //mutator functions        //sets customer number        public void setCusNumber (int n)        {                cust_number = n;        }        //sets mail list status        public void setMailList (boolean l)        {                cust_mailinglist = l;        }        public String toString()        {                return "Cust Name: " + getName() +                " Cust ID: " + cust_number +                " Mail List Status: " + cust_mailinglist;        }} //end customer class

Explanation / Answer

class Person
{
   private String c_Name;
   private String c_Address;
   private String c_Phone;
  
   public Person(String name, String address, String phone)
   {
       c_Name = name;
       c_Address = address;
       c_Phone = phone;
   }
  
   public String getName()
   {  
       return c_Name;
   }
  
   public String getAddress()
   {  
       return c_Address;
   }
  
   public String getPhone()
   {  
       return c_Phone;
   }
  
   public void setName(String name)
   {  
       c_Name = name;
   }
  
   public void setAddress(String address)
   {  
       c_Address = address;
   }
  
   public void setPhone(String phone)
   {
       c_Phone = phone;
   }
  
   public void showObj()
   {
       System.out.println("Name: " + this.getName());
       System.out.println("Adress: " + this.getAddress());
       System.out.println("Phone number: " + this.getPhone());
   }
}

class Customer extends Person
{
   private String c_Number;
   private boolean c_Mail;
  
   public Customer(String name, String address, String phone,
                    String number, boolean mail)
   {
       super(name, address, phone);
       c_Number = number;
       c_Mail = mail;
   }
  
   public String getNumber()
   {
       return c_Number;
   }
  
   public boolean getMail()
   {
       return c_Mail;
   }
  
   public void setNumber(String number)
   {
       c_Number = number;
   }
  
   public void setMail(boolean mail)
   {
       c_Mail = mail;
   }
  
   public void showObj()
   {
       super.showObj();
       System.out.println("Customer number: " + this.getNumber());
       System.out.println("On mailing list: " + (this.getMail() ? "Yes" : "No"));
   }
}

class PreferredCustomer extends Customer
{
   private double c_Amount;
   private int c_Discount;
  
   private void setDiscount()
   {
       if(c_Amount < 500.00)
           c_Discount = 0;
       else if(c_Amount >= 500.00 && c_Amount < 1000.00)
           c_Discount = 5;
       else if(c_Amount >= 1000.00 && c_Amount < 1500.00)
           c_Discount = 6;
       else if(c_Amount >= 1500.00 && c_Amount < 2000.00)
           c_Discount = 7;
       else
           c_Discount = 10;
   }
  
   public PreferredCustomer(String name, String address, String phone,
                             String number, boolean mail, double amount)
   {
       super(name, address, phone, number, mail);
       c_Amount = amount;
       setDiscount();
   }
  
   public double getAmount()
   {
       return c_Amount;
   }
  
   public int getDiscount()
   {
       return c_Discount;
   }
  
   public void setAmount(double amount)
   {
       c_Amount = amount;
       setDiscount();
   }
  
   public void showObj()
   {
       super.showObj();
       System.out.printf("Purchase amount: $%.2f ", this.getAmount());
       System.out.printf("Discount: %d%s ", this.getDiscount(), "%");
   }
}

public class Store
{
   public static void main(String[] args)
    {
       PreferredCustomer pc = new
       PreferredCustomer("Bob Jones", "1 Pine, Somewhere, CA 22202",
                          "517-220-8422", "001613467", true, 1000.00);
       System.out.println();
       pc.showObj();
   }
}

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