Help Please How to make the pooled object (bullet) disable after 10 seconds

I've been making a multiplayer top-down tank game, and I'm having a problem to make a script for this situation. i have a script of object pooling to my bullet so we can save memory, and we need to disable it after 10 seconds after firing. And also we want to limit the bullet to 5, so if the bullet is less than 5, you can still fire, if its already 5, you will not be able to fire (unless your bullet count became less than 5).`

using System.Collections; using System.Collections.Generic; using UnityEngine;

public class ObjectPool : MonoBehaviour { [SerializeField] protected GameObject objectToPool; [SerializeField] protected int poolSize = 10;

 protected Queue<GameObject> objectPool;

 public Transform spawnedObjectsParent;

 private void Awake()
 {
     objectPool = new Queue<GameObject>();

 }

 public void Initialize(GameObject objectToPool, int poolSize = 10)
 {
     this.objectToPool = objectToPool;
     this.poolSize = poolSize;

 }

 public GameObject CreateObject()
 {
     CreateObjectParentIfNeeded();

     GameObject spawnedObject = null;


     if (objectPool.Count < poolSize)
     {
         spawnedObject = Instantiate(objectToPool, transform.position, Quaternion.identity);
         spawnedObject.name = transform.root.name + "_" + objectToPool.name + "_" + objectPool.Count;
         spawnedObject.transform.SetParent(spawnedObjectsParent);
         spawnedObject.AddComponent<DestroyIfDisabled>();
     }
     else
     {
         spawnedObject = objectPool.Dequeue();
         spawnedObject.transform.position = transform.position;
         spawnedObject.transform.rotation = Quaternion.identity;
         spawnedObject.SetActive(true);
         StartCoroutine(DeactivateBullet());
     }

     objectPool.Enqueue(spawnedObject);
     return spawnedObject;
 }

 private void CreateObjectParentIfNeeded()
 {
     if (spawnedObjectsParent == null)
     {
         string name = "ObjectPool_" + objectToPool.name;
         var parentObject = GameObject.Find(name);
         if (parentObject != null)
             spawnedObjectsParent = parentObject.transform;
         else
         {
             spawnedObjectsParent = new GameObject(name).transform;
         }

     }
 }

 private void OnDestroy()
 {
     foreach (var item in objectPool)
     {
         if (item == null)
             continue;
         else if (item.activeSelf == false)
             Destroy(item);
         else
             item.GetComponent<DestroyIfDisabled>().SelfDestructionEnabled = true;
     }
 }
 private IEnumerator DeactivateBullet()
 {
     yield return new WaitForSeconds(10f);
     spawnedObject.SetActive(false);
 }

}`