Conditional Challange--The question prompts are not showing up in the preview. What am I missing?

//Quiz start
var correct=0;

//Ask questions

var answer1 = prompt ("Snoop last name");
  if (answer1.toUpperCase() === 'DOGG') {
      correct += 1;
  }

 var answer2= prompt ("What is the capital of Vietnam?");
  if (answer2.toUpperCase() === 'HANOI') {
     correct +=1;
  }

var answer3 = prompt ("When is the USA election day?");
 if (answer3.toUpperCase() === 'NOVEMBER 8TH') {
     correct +=1;
 }

var answer4 = prompt ("Who is the biggest ahole running for president of the USA?");
  if (answer4.toUpperCase () === 'TRUMP') {
     correct +=1; 
 }

var answer5 = prompt ("Who wrote Slaughterhouse 5?") ;
    if (answer5.toUpperCase () === 'VONNEGUT') {
       correct +=1; 
 }

   //Output results 

document.write ('<p> You got ' + correct  + ' out of five questions.</p>'); 
  //output rank
if ( correct ===5) {
   document.write ('<p><strong>You earned a gold crown!</strong></p>');
    } else if (correct >= 3 ) {
   document.write ('<p><strong>You earned a silver crown.</strong></p>');
    } else if (correct >=1) {
   document.write ('<p><strong>You earned a bronze crown.</strong></p>');
    } else { 
   document.write ('<p><strong>You know nothing, John Snow.</strong></p>');