can someone help with this code it doses not work?

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
public class survey {
private static int mark = 0;
public static void start(){
int point;
BufferedReader bReader = new BufferedReader (new
InputStreamReader(System.in));
try {
System.out.println(“Question N1: “);
System.out.println(“Which is a better platform?”);
System.out.println(“1: Facebook 2: Twitter”);
String question = bReader.readLine();
point = Integer.parseInt(data);
switch(point){
case 1:break;
case 2: mark++;break;
default:break;
}
System.out.println(“Question N2: “);
System.out.println(“The member of Loksabha holds a time periodof;);
System.out.println(“1: 5 years 2: 6 years”);
question = bReader.readLine();
point = Integer.parseInt(data);
switch(point){
case 1:mark++;break;
case 2:break;
default:break;
}
System.out.println(“Question N3: “);
System.out.println(” The minimum age to qulify for the election ofLoksabha “);
System.out.println(“1: 25 years 2: 18 years”);
question = bReader.readLine();
point = Integer.parseInt(data);
switch(point){
case 1:break;
case 2:mark++;break;
default:break;
}
System.out.println(“Question N4: “);
System.out.println(“the great victoria dsert is located in”);
System.out.println(“1: Australia 2: West africa”);
question = bReader.readLine();
point = Integer.parseInt(data);
switch(point){
case 1:mark++;break;
case 2:break;
default:break;
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public static void main(String[] args){
System.out.println(“Welcome to Quiz!”);
start();
System.out.println(“Your score is: “+mark);
System.out.println(“1. Enter another set of responses to the sameset of
questions”);
System.out.println(“2. Quit”);
BufferedReader bReader = new BufferedReader (new
InputStreamReader(System.in));
String question;
try {
question = bReader.readLine();
int point = Integer.parseInt(data);
switch(point){
case 1_mark=0;start();System.out.println(“Your point is:”+mark);break;
case 2:System.exit(1);
default:System.exit(1);
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}