I get 2 errors in my AI script and 1 warning and can`t figure it out by myself..

1. (35,20): error CS1525: Unexpected symbol `else'

2. (52,1): error CS8025: Parsing error

3. (33,17): warning CS0642: Possible mistaken empty statement

using UnityEngine; using System.Collections;

public class AI1: MonoBehaviour {

 public Vector3 Player;
 
 public Vector2 PlayerDirection;
 private float Xdif;
 private float Ydif;
 public Transform target;
 public float speed;
 public float rotatespeed = 5f;
 private float rotZ;
 private int Wall;
 private float distance;
 private bool stun;
 private float stuntime;
 
 void Start () {
     stuntime = 0;
     stun = false;
     Wall = 1 << 8;
     speed = 0.9f;
     
 }
 
 void Update () {

     distance = Vector2.Distance (Player, transform.position);
     Player = GameObject.Find("Player").transform.position;

     if(stuntime > 0)(
         stuntime -= Time.deltaTime)
     else {
         stun = false)
     }
     if (distance < 1.5 && !stun) {
     Xdif = Player.x - transform.position.x;
     Ydif = Player.y - transform.position.y;
     PlayerDirection = new Vector2 (Xdif, Ydif);

     if (!Physics2D.Raycast (transform.position, PlayerDirection, 3, Wall)) {
                     rigidbody2D.AddForce (PlayerDirection.normalized * speed);
                     }


                     rotZ = Mathf.Atan2 (Player.y, Player.x) * Mathf.Rad2Deg;
                     transform.rotation = Quaternion.LookRotation ((new Vector3 (0f, 0f, rotZ)));
             }
         }

}

 void OnCollisionEnter2D (Collision2D Playerhit)(
     if (Playerhit.gameobject.tag ("Player"){
         stun = true;
         stuntime = 1;
     }
 }

}