laravel get last record

1Model::latest()->first();

1Dogs::latest()->take(5)->get();
2

1return DB::table('files')->order_by('upload_time', 'desc')->first();

1$row = News::count();
2        $newsid = $row -2;
3        $news1 = News::all()->last();
4        $news2 = News::orderBy('created_at', 'desc')->skip($newsid)->take($newsid)->first();
5        return view('user/start', compact('news1', 'news2', 'newsid'));