Nivedha

 import java.io.*; import java.util.Scanner; class FS {     public static void main(String[] args) {         Scanner scanner = new Scanner(System.in);         String fileName = "msc1.txt";         int choice;         do {             System.out.println("\nFile Operations Menu:");             System.out.println("1. Create a File");             System.out.println("2. Write to the File");             System.out.println("3. Read from the File");             System.out.println("4. Update the File");             System.out.println("5. Delete the File");             System.out.println("6. Exit");             System.out.print("Enter your choice: ");     ...

 // Define the Product class class Product {     private String name;     private double price;     private int quantity;     private double taxRate; // Tax rate as a decimal (e.g., 0.08 for 8%)     // Constructor to initialize the product     public Product(String name, double price, int quantity, double taxRate) {         this.name = name;         this.price = price;         this.quantity = quantity;         this.taxRate = taxRate;     }     // Method to calculate the total cost including tax     public double calculateTotalCost() {         double subtotal = price * quantity;         double taxAmount = subtotal * taxRate;         double totalCost = subtotal + taxAmount;         return totalCost;     }     // Getter...