AppDelegate / ViewController (IBAction error) - Swift iOS

Question

My "AppDelegate.swift" file will not connect to my IBAction functions! Please help!!!!

@UIApplicationMain
class AppDelegate: UIResponder, UIApplicationDelegate {
 var window: UIWindow?

    func application(application: UIApplication, didFinishLaunchingWithOptions launchOptions: [NSObject: AnyObject]?) -> Bool { return true }

    func applicationWillResignActive(application: UIApplication) { }

    func applicationDidEnterBackground(application: UIApplication) { }

    func applicationWillEnterForeground(application: UIApplication) { }

    func applicationDidBecomeActive(application: UIApplication) { }

    func applicationWillTerminate(application: UIApplication) { }
}

// Below this line I included the "ViewController.swift" file :

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var Question: UILabel!
    @IBOutlet weak var Answer1: UIButton!
    @IBOutlet weak var Answer2: UIButton!
    var CorrectAnswer = String()


override func viewDidLoad() {
    super.viewDidLoad()
    RandomQuestions() }


override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning() }


func RandomQuestions() {
    var RandomNumber = arc4random() % 2
    RandomNumber += 1

    switch(RandomNumber) {
    case 1 :
        Question.text = "What are two languages used to develop Mac iOS apps?"
        Answer1.setTitle("HTML & JavaScript", forState: UIControlState.Normal)
        Answer2.setTitle("Objective-C & Swift", forState: UIControlState.Normal)
        CorrectAnswer = "2"
        break
    case 2 :
        Question.text = "Which Mac iOS language does not need semicolons?"
        Answer1.setTitle("Swift", forState: UIControlState.Normal)
        Answer2.setTitle("Objective-C", forState: UIControlState.Normal)
        CorrectAnswer = "1"
        break
    default :
        break } }


    @IBAction func Answer1(sender: AnyObject) {
        if (CorrectAnswer == "1") { Question.text = "You are Right!" }
        else if (CorrectAnswer == "2") { Question.text = "You are Right!" }
    }

    @IBAction func Answer2(sender: AnyObject) {
        if (CorrectAnswer == "1") { Question.text = "You are Right!" }
        else if (CorrectAnswer == "2") { Question.text = "You are Right!" }
    }
}