laravel get last 5 records

Dogs::latest()->take(5)->get();

return DB::table('files')->order_by('upload_time', 'desc')->first();

$row = News::count();
        $newsid = $row -2;
        $news1 = News::all()->last();
        $news2 = News::orderBy('created_at', 'desc')->skip($newsid)->take($newsid)->first();
        return view('user/start', compact('news1', 'news2', 'newsid'));