How To count "approved replies" and count of "categories" in view by laravel?

//I tried to get count of( approved replies) and count of (category) in view as following but this is not work with me!!

In View:

 @if($posts)
        @foreach($posts as$post)

<p>No. approved replies=</p>
 <p>No. category=


        @endforeach
    @endif

In Post controller:

       public function index()
       {
            $posts=Post::all();
            return view('Admin.posts.index',compact('posts'));
       }

In Post model:

        <?php

            namespace App;
            use Illuminate\Database\Eloquent\Model;

           class Post extends Model
        {

            protected $fillable=[
                'title','body','category_id','photo_id'
            ];

            public function user(){
                return $this->belongsTo('App\User');
            }

            public function category(){
                return $this->belongsTo('App\Category');
            }

            public function comments(){
                return $this->hasMany('App\Comment');
            }
        }

    ///

In Comment model:

    <?php

    namespace App;

    use Illuminate\Database\Eloquent\Model;

    class Comment extends Model
    {

        protected $fillable=[
            'post_id',
            'photo',
            'author',
            'email',
            'body',
            'is_active'
        ];
        public function replies(){
            return $this->hasMany('App\CommentReply');
        }
        public function post(){
            return $this->belongsTo('App\Post');
        }
    }

In CommentReply model:

namespace App;

use Illuminate\Database\Eloquent\Model;

class CommentReply extends Model
{
    protected $fillable=[
        'comment_id',
        'is_active',
        'author',
        'photo',
        'email',
        'body'
    ];

    public function comment(){
        return $this->belongsTo('App\Comment');
    }

}

/////////////////////////////////////////////////////////////////////////////////

via Chebli Mohamed