How do I apply damage to enemy ai in unity c#

Okay . I don't have any errors . The problem I am having is the enemy ai wont take any damage when I shoot . I have a health script and a rifle script. I don't know what is going here are my scripts :

using UnityEngine; using Opsive.ThirdPersonController.Wrappers;

public class attack01 : MonoBehaviour { private health2016 health2016Script; public int damagePerShot = 2; public float timeBetweenBullet = 0.15f; public float range = 100f; public GameObject bear; float timer; Ray shootRay; RaycastHit shootHit; int shootableMask; LineRenderer gunLine; AudioSource gunAudio; Light gunLight; float effectsDisplayTime = 0.2f;

 void Start () {

 health2016Script = bear.GetComponent<health2016>();
 shootableMask = LayerMask.GetMask ("Shootable");
     gunLine = GetComponent <LineRenderer>();
     gunAudio = GetComponent <AudioSource>();
     gunLight = GetComponent <Light>();
 
 
 }
 

 

 public void Disable () 
 {
     gunLine.enabled = false;
     gunLine.enabled = false;
 }

void Shoot () { timer = 0f;

     gunAudio.Play ();
     
     gunLine.enabled = true;
     gunLine.SetPosition (0, transform.position);
     shootRay.origin = transform.position;
     shootRay.direction = transform.forward;
     
     if(Physics.Raycast (shootRay, out shootHit, range, shootableMask))
     {
         health2016 health2016Script = shootHit.collider.GetComponent <health2016> ();
         if (health2016Script != null)
         {
             health2016Script.TakeDamage (damagePerShot, shootHit.point);
             
         }
         
         gunLine.SetPosition (1, shootHit.point);
         
     }
             
     else 
     {
         gunLine.SetPosition (1, shootRay.origin + shootRay.direction * range);
         
     }
 }       

         

}

using UnityEngine; using Opsive.ThirdPersonController.Wrappers;

public class health2016 : MonoBehaviour { public int Health; private CapsuleCollider capsuleCollider; void Start () {

 }
 

 public void TakeDamage (int amount , Vector3 hitPoint) {
  Health -= amount;
 }
 void Die()
 {
     capsuleCollider.isTrigger = true;
     
 }
 

}