Java basic program code error

Hi,

I am having problem with this quiz basic Java program (see code). This is my first program and any help what be appreciated. Thanks in advance.

public class Quiz{
public static void main (String args[])
{
     System.out.println ("Welcome to the Quiz Game!");
     int ans2=1;    
   
    do{
             
       System.out.println ("The instructions are: you will be given one type of topic,");
       System.out.println ("The topic will have 3 multiple choice questions");
       System.out.println ("If you get one wrong you start from the beginning.");
       System.out.println ("If you get them all right you will win");
 int ans1=Keyboard.readInt();
       
           System.out.println ("First question: How many players are there in 1 football team?");
           System.out.println ("9");
           System.out.println ("10");
           System.out.println ("11");
if((ans1==11)){      
        System.out.println ("Question 2: Which of these teams play in the Premeir League?");
        System.out.println ("press 1 for Juventus");
        System.out.println ("press 2 for Chelsea");
        System.out.println ("press 3 for PSG");
if((ans1==11 & ans1==2));
        System.out.println ("Correct");
        System.out.println ("Question 3: How do you score?");
        System.out.println ("press 1 if by kicking the ball into the net");
        System.out.println ("press 2 if by throwing the ball into the net");
        System.out.println ("press 3 if by kicking the ball outside the terf");
if((ans1==11 & ans1==2 & ans1==1));
            System.out.println ("Correct");
            System.out.println ("Question 4: What shape is the football?");
            System.out.println ("press 1 for cube");
            System.out.println ("press 2 for sphere");
            System.out.println ("press 3 for triangle");
if((ans1==11 & ans1==2 & ans1==1 & ans1==2))
                System.out.println ("Game Over, You Win!");
  else
  System.out.println ("Game Over, You Lose!");}
     
  }while (ans2==1);
 }
}