Write a program to extend the below program by adding an option 'g' to the menu program. If this option is chosen, the program gets a string from the user (up to a maximum of 50 characters) and swaps the first and last characters.   Main.java import java.util.Scanner; public class Main {    static Scanner kb = new Scanner(System.in);  public static void displayMenu() {   System.out.println("a-Print Name and Tutor Name");   System.out.println("b-Largest of 3 Number");   System.out.println("c-Display Numbers in range of two numbers");   System.out.println("d-Check for Triangles");   System.out.println("e-Check for prime");   System.out.println("f-Arrays Example"); //adding statement   System.out.println("q-Quit");   System.out.print("Enter Your Choice (a,b,c,d,e,f,q) : ");  }  public static void findLargestOf3() {   double x, y, z, smallest, largest;   System.out.println("Enter 3 Numbers : ");   System.out.print("x : ");   x = Double.parseDouble(kb.nextLine());   System.out.print("y : ");   y = Double.parseDouble(kb.nextLine());   System.out.print("z : ");   z = Double.parseDouble(kb.nextLine());   smallest = (x < y && x < z) ? x : (y < x && y < z) ? y : z;   largest = (x > y && x > z) ? x : (y > x && y > z) ? y : z;   System.out.println("The Smallest Number is : " + smallest);   System.out.println("The Largest Number is : " + largest);  }  public static void displayNumbersinRange() {   int m, n, s = 0, t;   System.out.println("Enter 2 Numbers : ");   System.out.print("m : ");   m = Integer.parseInt(kb.nextLine());   System.out.print("n : ");   n = Integer.parseInt(kb.nextLine());   if (m > n) {    t = n;    n = m;    m = t;   }   for (int i = m, j = 1; i < n; i++, j++) {    System.out.print(i + " ");    if (j % 5 == 0)     System.out.println();    if (i % 2 != 0)     s += i;   }   System.out.println("\nThe Sum of all odd numbers between " + m + " and " + n + " is : " + s);  }  public static void checkTriangle() {   double s1, s2, s3;   System.out.println("Enter 3 Sides of Triangle : ");   System.out.print("s1 : ");   s1 = Double.parseDouble(kb.nextLine());   System.out.print("s2 : ");   s2 = Double.parseDouble(kb.nextLine());   System.out.print("s3 : ");   s3 = Double.parseDouble(kb.nextLine());   if (s1 > s2 + s3 || s2 > s1 + s3 || s3 > s1 + s2) {    System.out.println("The Given sides can from a Triangle");   } else    System.out.println("The Given sides can not from a Triangle");  }  public static void checkPrime() {   int m, c = 0;   System.out.print("Enter a Numbers : ");   m = Integer.parseInt(kb.nextLine());   for (int i = 1; i <= m; i++) {    if (m % i == 0)     c++;   }   if (c == 2)    System.out.println("The given number is Prime");   else    System.out.println("The given number is not a Prime");  }  public static void main(String[] args) {   char ch = 'x';   while (ch != 'q') {    displayMenu();    ch = kb.nextLine().toLowerCase().charAt(0);    switch (ch) {    case 'a':     System.out.println("My Name \n My Tutor Name");     break;    case 'b':     findLargestOf3();     break;    case 'c':     displayNumbersinRange();     break;    case 'd':     checkTriangle();     break;    case 'e':     checkPrime();     break;    case 'f': //adding another case     newFunction();     break;    case 'q':     break;    default:     System.out.println("Error : Invalid Input ");     break;    }   }  }  public static void newFunction() {   int[] array=new int[10]; //declare array   System.out.println("Enter 10 elements into array");   for(int i=0;i<10;i++) //i from 0 to 9    array[i] = Integer.parseInt(kb.nextLine()); //input element at index i      int min=array[0], max=array[0], sum=array[0]; //initialize all variables      for(int i=1;i<10;i++) { //i from 1 to 9    if(array[i]max)  //if element at index i more than max     max=array[i];    sum=sum+array[i];  //add element at index i to sum   }      //print all values   System.out.println("Average of 10 numbers is: "+(sum/10.0));   System.out.println("Highest number is: "+max);   System.out.println("Lowest number is: "+min);  } }