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public class LabProgram {   public static void main(String args[]) {   Course course = new Course(); String first;  // first name       String last;   // last name       double gpa;    // grade point average              first = "Henry";       last = "Cabot";       gpa = 3.5;       course.addStudent(new Student(first, last, gpa));  // Add 1st student              first = "Brenda";       last = "Stern";       gpa = 2.0;       course.addStudent(new Student(first, last, gpa));  // Add 2nd student              first = "Jane";       last = "Flynn";       gpa = 3.9;       course.addStudent(new Student(first, last, gpa));  // Add 3rd student              first = "Lynda";       last = "Robison";       gpa = 3.2;       course.addStudent(new Student(first, last, gpa));  // Add 4th student   course.printRoster(); }     } // Class representing a student public class Student {   private String first;  // first name private String last;   // last name private double gpa;    // grade point average…

// This class discounts prices by 10% public class DebugFour4 {    public static void main(String args[])    {       final double DISCOUNT_RATE = 0.90;       int price = 100;       double price2 = 100.00;       tenPercentOff(price DISCOUNT_RATE);       tenPercentOff(price2 DISCOUNT_RATE);    }    public static void tenPercentOff(int p, final double DISCOUNT_RATE)    {       double newPrice = p * DISCOUNT_RATE;       System.out.println("Ten percent off  " + p);       System.out.println("  New price is " + newPrice);    }    public static void tenPercentOff(double p, final double DISCOUNT_RATE)    {       double newPrice = p * DISCOUNT_RATE;       System.out.println"Ten percent off " + p);       System.out.println("  New price is " + newprice);    } }

public static class Lab2{public static void Main(){int idNum;double payRate, hours, grossPay;string firstName, lastName;// prompt the user to enter employee's first nameConsole.Write("Enter employee's first name => ");firstName = Console.ReadLine();// prompt the user to enter employee's last nameConsole.Write("Enter employee's last name => ");lastName = Console.ReadLine()// prompt the user to enter a six digit employee numberConsole.Write("Enter a six digit employee's ID => ");idNum = Convert.ToInt32(Console.ReadLine());// prompt the user to enter the number of hours employeeworkedConsole.Write("Enter the number of hours employee worked =>");// prompt the user to enter the employee's hourly pay rateconsole.Write("Enter employee's hourly pay rate: ");payRate = Convert.ToDouble(Console.ReadLine());// calculate gross paygrossPay = hours * payRate;// output resultsConsole.WriteLine("Employee {0} {1}, (ID: {2}) earned {3}",firstName, lastName, idNum,…