Our assignment to write megaMillion.java I have written this program but that is using array and our professor require us to use vector, which i don't know how to use. So can you guys please help me. Code: import java.util.*; public class megaMillion { public static void main(String []args) {int [][] group1=new int [5][5]; int[] group2=new int[5]; int i,cards,j; String yorn; char c; Scanner in=new Scanner(System.in); do {Random number = new Random(); do{ System.out.print("how many cards do you mant to play? at most 5: "); cards=in.nextInt(); }while(cards<1||cards>5); for(i=0;i<cards;i++) {group2[i]=number.nextInt(46) +1;; for(j=0;j<5;j++) GenWinNums(group1,i,5,56,number); } System.out.println("\nYour Tickets are"); for(i=0;i<cards;i++) {System.out.print("Ticket "+(i+1)+":\t"); for(j=0;j<5;j++) System.out.print(group1[i][j]+"\t"); System.out.println("::\t"+group2[i]); } System.out.print("\nplay again (y/n) "); yorn=in.next(); c=yorn.charAt(0); }while(c=='Y'||c=='y'); } public static boolean NoDuplicates(int a[][],int card,int n) {int i; boolean dup=false; if(n==0) return false; for(i=0;i<=n-1;i++) if(a[card][n]==a[card][i]) dup=true; return dup; } public static void GenWinNums(int a[][],int card,int n,int max, Random number) {int i; boolean dup=true; for(i=0;i<n;i++) {while(dup) { a[card][i]=number.nextInt(max) +1; dup=NoDuplicates(a,card,i); } dup=true; } sort(a,card,n); } public static void sort(int a[][],int card,int n) {int i,j,t; for(i=0;i<n-1;i++) for(j=i+1;j<n;j++) if(a[card][i]>a[card][j]) {t=a[card][i]; a[card][i]=a[card][j]; a[card][j]=t; } return; }}