error can’t be assigned to the parameter

void main() {
runApp(acf());
}

class acf extends StatefulWidget {
@override
State<acf> createState() => _acfState();
}

class _acfState extends State<acf> {
//const acf({Key? key}) : super(key: key);
var soalIndex = 0;
var totalSkor = 0;

var pertanyaan = [
{
‘pertanyaan’: ‘bedak apa yang berwarna putih?’,
‘jawaban’: [
{‘text’: ‘shared pink’, ‘skor’: 40},
{‘text’: ‘shared natural’, ‘skor’: 70},
{‘text’: ‘bedak bayi’, ‘skor’: 10},
{‘text’: ‘bedak bulus’, ‘skor’: 0},
],
},
{
‘pertanyaan’: ‘sr12 punya obat ketek?’,
‘jawaban’: [
{‘text’: ‘ada’, ‘skor’: 80},
{‘text’: ‘tidak’, ‘skor’: 10},
{‘text’: ‘mana saya tau, saya kan ikan’, ‘skor’: -80},
],
},
{
‘pertanyaan’: ‘siapa direktur sr12?’,
‘jawaban’: [
{‘text’: ‘aris’, ‘skor’: 100},
{‘text’: ‘cici’, ‘skor’: 100},
{‘text’: ‘khadijah’, ‘skor’: 100},
{‘text’: ‘hafshah’, ‘skor’: 100},
],
},
];

void jawaban(int skor) {
//print(‘tombol sudah di tekan’);

totalSkor = totalSkor + skor;
setState(() {
soalIndex += 1;
});
if (soalIndex < pertanyaan.length) {
print(‘masih ada soal berikutnya’);
} else {
print(‘soal sudah habis’);
}
print(soalIndex);
}

@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: Text(‘KH STORE’),
),
body: soalIndex < pertanyaan.length
? Kuis(
jawaban: jawaban,
pertanyaan: pertanyaan,
soalIndex: soalIndex,
)
: Hasil(),
),
);
}
}