Added quiz features

app/Models/UserQuizAnswer.php

@@ -0,0 +1,41 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class UserQuizAnswer extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'attempt_id',
+        'question_id',
+        'selected_option_id',
+        'text_answer',
+        'is_correct',
+        'earned_score',
+        'reviewer_feedback',
+    ];
+
+    protected $casts = [
+        'is_correct' => 'boolean',
+        'earned_score' => 'float',
+    ];
+
+    public function attempt()
+    {
+        return $this->belongsTo(UserQuizAttempt::class, 'attempt_id');
+    }
+
+    public function question()
+    {
+        return $this->belongsTo(Question::class, 'question_id');
+    }
+
+    public function selectedOption()
+    {
+        return $this->belongsTo(QuestionOption::class, 'selected_option_id');
+    }
+}