     var tcatImage = UIImageView()
     var sendFeedbackButton = UIButton()
     var visitWebsiteButton = UIButton()
-    var cancelButton = UIButton(type: .system)
+    var backButton = UIButton(type: .system)
     
     override func viewDidLoad() {
         super.viewDidLoad()

        titleLabel.text = "Made by AppDev"
        titleLabel.backgroundColor = .clear
        titleLabel.snp.makeConstraints { (make) in
            make.centerX.equalToSuperview()
            make.bottom.equalTo(descriptionLabel.snp.top).offset(-12)
        }
        
        descriptionLabel.font = UIFont(name: FontNames.SanFrancisco.Regular, size: 14)

        title = "About Us"
        
        view.backgroundColor = UIColor.tableBackgroundColor
        navigationController?.navigationBar.tintColor = .primaryTextColor
        
        view.addSubview(titleLabel)
        view.addSubview(descriptionLabel)
        view.addSubview(sendFeedbackButton)
        view.addSubview(visitWebsiteButton)
        view.addSubview(tcatImage)
        
        backButton.addTarget(self, action: #selector(backButtonClicked), for: .touchUpInside)
        backButton.setImage(UIImage(named: "back"), for: .normal)
        let attributedString = NSMutableAttributedString(string: "  Book")
        attributedString.addAttribute(NSAttributedStringKey.baselineOffset, value: 0.3, range: NSMakeRange(0, attributedString.length))
        backButton.setAttributedTitle(attributedString, for: .normal)
        backButton.sizeToFit()
        let backButtonItem = UIBarButtonItem(customView: backButton)
        navigationItem.setLeftBarButton(backButtonItem, animated: false)
        
        tcatImage.image = UIImage(named: "tcatbus")
        tcatImage.snp.makeConstraints { (make) in
            make.centerX.equalToSuperview()
            make.top.equalTo(topLayoutGuide.snp.bottom).offset(44)
            make.width.equalTo(tcatImage.snp.height).multipliedBy(2.5)
            make.leading.equalToSuperview().offset(40)
            make.trailing.equalToSuperview().offset(-40)
        }
        
        titleLabel.font = UIFont(name: FontNames.SanFrancisco.Medium, size: 16)
