How to make a game object been shoot, on mouse button been clicked, as it enters an area ,How to make a game object enters an area be shoot as on mouse been clicked

Hello,

all I'm currently working on shooting the game object as it enters an area, and as it enters the area, if the mouse been clicked, that game object would be shot, how to achieve that?

 public class shoot : MonoBehaviour
 {
     [SerializeField] float speed = 10f;
     void OnTriggerEnter ( Collider other )
     {
             if (other.gameObject.CompareTag("ball"))
             {
                     Debug.Log("ball detected");
                 if (Input.GetMouseButtonDown(0))
                     {
                         Debug.Log("shoot!");
                         other.gameObject.GetComponent<Rigidbody>().AddForce(transform.forward * speed, ForceMode.Impulse);
                     }
         }
     }
 }

Thanks!