All of my questions are coming back as incorrect for the user

For the conditional challenge, you're asked to create a five question quiz that keeps track of the user's score and gives them a crown (I used medal in place of this) at the end based upon their score. However, all of the questions in my program return an incorrect answer for the user and I can't figure out what's going wrong! Any help would be greatly appreciated! :)

http://port-80-ywfm1jo78g.treehouse-app.com

// Common variables

var score = 0; var answer = false;

// Beginning of quiz

alert('Welcome to the quiz. There will be five questions in total.');

// Ask user for name

var name = prompt('What is your name?');

// First question

var answerOne = prompt('What does 2 + 2 equal?'); if (parseInt(answerOne) === '4') { answer = true; alert('You answered correctly. 1 out of 5 questions correct.'); score += 1; } else { alert('Your answer was incorrect. You have answered ' + score + ' questions correctly.'); }

// Second question

var answerTwo = prompt('What country is Sydney located in?'); if (answerTwo.toUpperCase() === 'Australia') { answer = true; alert('You answered correctly. ' + score + ' out of 5 questions correct.'); score += 1; } else { alert('Your answer was incorrect. You have answered ' + score + ' questions correctly.');
}

// Third question

var answerThree = prompt('What sport do the Seattle Seahawks play?'); if (answerThree.toUpperCase() === 'football' || answerThree.toUpperCase() === 'nfl') { answer = true; alert('You answered correctly. ' + score + ' out of 5 questions correct.'); score += 1; } else { alert('Your answer was incorrect. You have answered ' + score + ' questions correctly.');
}

// Fourth question

var answerFour = prompt('How many ounces are in one cup?'); if (parseInt(answerFour) === '8' || parseInt(answerFour) === 'eight' ) { answer = true; alert('You answered correctly. ' + score + ' out of 5 questions correct.'); score += 1; } else { alert('Your answer was incorrect. You have answered ' + score + ' questions correctly.'); }

// Fifth question

var answerFive = prompt('Where is Surfers Paradise located?'); if (answerFive.toUpperCase() === 'Gold Coast') { answer = true; alert('You answered correctly. ' + score + ' out of 5 questions correct.'); score += 1; } else { alert('Your answer was incorrect. You have answered ' + score + ' questions correctly.'); }

// Quiz report card

document.write('You answered ' + score + ' questions correctly '+ name + '. '); if (score === 5) { document.write('You received a gold medal for answered all five questions correctly!'); } else if (score === 3 || score === 4) { document.write('You received a silver medal for answering at least three questions correctly!'); } else if (score === 1 || score === 2) { document.write('You received a bronze medal for answered at least one questions correctly!'); } else { document.write('You did not receive a medal since 0 questions were anwered correctly.'); }