void SpawnEnemy(int i)
    {
        GameObject enemy = Instantiate(_enemyToSpawn, _chosenSpawnsPoints[i].transform.position, Quaternion.identity);

        enemy.GetComponent <NavMeshAgent>().speed       = _stats.Speed;
        enemy.GetComponent <NavMeshAgent>().destination = Vector3.zero;

        EnemyAgent agent = enemy.GetComponent <EnemyAgent>();

        agent.SetIsWaveEnemy(true);
        agent.enabled = true;
    }