Strange error in swift which I can't figure out. Code is exactly the same as in textbook. Error in three places

Question

So I have been working on this project for a couple days as there are lots of things to link and code to write. Despite the fact that it is guided using the swift fundamentals book thing, I can't figure out why I am getting the error that I am since everything is written exactly as it is in the book. I am getting an error saying can't convert string to type [Answer]

import UIKit

class QuestionViewController: UIViewController {
    @IBOutlet var singleStackView: UIStackView!
    @IBOutlet var singleButton1: UIButton!
    @IBOutlet var singleButton2: UIButton!
    @IBOutlet var singleButton3: UIButton!
    @IBOutlet var singleButton4: UIButton!
    @IBOutlet var multipleStackView: UIStackView!
    @IBOutlet var multiLabel1: UILabel!
    @IBOutlet var multiLabel2: UILabel!
    @IBOutlet var multiLabel3: UILabel!
    @IBOutlet var multiLabel4: UILabel!
    @IBOutlet var rangedStackView: UIStackView!
    @IBOutlet var rangedLabel1: UILabel!
    @IBOutlet var rangedLabel2: UILabel!
    @IBOutlet var questionLabel: UILabel!
    @IBOutlet var questionProgressView: UIProgressView!
    override func viewDidLoad() {
        super.viewDidLoad()
        updateUI()
    }
    func updateUI() {
        singleStackView.isHidden = true
        multipleStackView.isHidden = true
        rangedStackView.isHidden = true
        let currentQuestion = questions[questionIndex]
        let currentAnswers = currentQuestion.text
        let totalProgress = Float(questionIndex) /
            Float(questions.count)
        navigationItem.title = "Question #\(questionIndex + 1)"
        questionLabel.text = currentQuestion.text
        switch currentQuestion.type {
        case .single:
            updateSingleStack(using: currentAnswers) //error 1
        case .multiple:
            updateMultipleStack(using: currentAnswers) //error 2
        case .ranged:
            updateRangedStack(using: currentAnswers) //error 3
        }
    }
    func updateSingleStack(using answers: [Answer]) {
        singleStackView.isHidden = false
        singleButton1.setTitle(answers[0].text, for: .normal)
        singleButton2.setTitle(answers[1].text, for: .normal)
        singleButton3.setTitle(answers[2].text, for: .normal)
        singleButton4.setTitle(answers[3].text, for: .normal)
    }
    func updateMultipleStack(using answers: [Answer]) {
        multipleStackView.isHidden = false
        multiLabel1.text = answers[0].text
        multiLabel2.text = answers[1].text
        multiLabel3.text = answers[2].text
        multiLabel4.text = answers[3].text
    }
    func updateRangedStack(using answers: [Answer]) {
        rangedStackView.isHidden = false
        rangedLabel1.text = answers.first?.text
        rangedLabel2.text = answers.last?.text
    }
    var questionIndex = 0
    var questions: [Question] = [
        Question(
            text: "Which food do you like the most?",
            type: .single,
            answers: [
                Answer(text: "Steak", type: .dog),
                Answer(text: "Fish", type: .cat),
                Answer(text: "Carrots", type: .rabbit),
                Answer(text: "Corn", type: .turtle)
            ]
        ),
        Question(
            text: "Which activities do you enjoy?",
            type: .multiple,
            answers: [
                Answer(text: "Swimming", type: .turtle),
                Answer(text: "Sleeping", type: .cat),
                Answer(text: "Cuddling", type: .rabbit),
                Answer(text: "Eating", type: .dog)
            ]
        ),
        Question(
            text: "How much do you enjoy car rides?",
            type: .ranged,
            answers: [
                Answer(text: "I dislike them", type: .cat),
                Answer(text: "I get a little nervous", type: .rabbit),
                Answer(text: "I barely notice them", type: .turtle),
                Answer(text: "I love them", type: .dog)
             ]
         )
    ]
}