Test-Eloquent-Relationships/app/Http/Controllers/CountryController.php

<?php

namespace App\Http\Controllers;

use App\Models\Country;

class CountryController extends Controller
{
    public function index()
    {
        // TASK: load the relationship average of team size
        $countries = Country::withAvg('teams', 'size')->get();

        return view('countries.index', compact('countries'));
    }
}