Unexpected symbol `}', expecting `;' and else

I actually have a lot of problem over here. I'm quite sure I'm doing this right:

 using UnityEngine;
 using System.Collections;
 using System.Collections.Generic;
 
 public class Targetting : MonoBehaviour {
     public List<Transform> targets;
     public Transform selectedTarget;
 
     private Transform myTransform;
 
     // Use this for initialization
     void Start () {
         targets = new List<Transform> ();
         selectedTarget = null;
         myTransform = transform;
 
         AddAllEnemies ();
     
     }
 
     public void AddAllEnemies()
     {
         GameObject[] go = GameObject.FindGameObjectsWithTag ("Enemy");
 
         foreach (GameObject enemy in go)
             AddTarget (enemy.transform);
     }
 
     public void AddTarget (Transform enemy)
     {
         targets.Add (enemy);
     }
 
     private void SortTargetsByDistance()
     {
         targets.Sort(delegate(Transform t1, Transform t2) {
             return Vector3.Distance(t1.position, myTransform.position).CompareTo(Vector3.Distance(t2.position, myTransform.position))
         });
                 
     }
 
     private void TargetEnemy()
         {
             if(selectedTarget == null)
             {
                 SortTargetsByDistance();
                 selectedTarget = targets[0];
             }    
         }
     
     // Update is called once per frame
     void Update ()  {
         if (Input.GetKeyDown (KeyCode.Tab)) 
         {
             TargetEnemy ();
         }
     }
 }
 

But these errors keep showing up:

Assets/Scripts/Targetting.cs(38,17): error CS1525: Unexpected symbol }', expecting ;'

Assets/Scripts/Targetting.cs(42,15): error CS1525: Unexpected symbol private', expecting ;'

Assets/Scripts/Targetting.cs(52,14): error CS0116: A namespace can only contain types and namespace declarations

Assets/Scripts/Targetting.cs(58,1): error CS8025: Parsing error

I've been looking for the failiures for more than a day, and I couldn't find it. Does anyone have any idea what's wrong with it?

Note: I'm no pro, so sorry.