Hello and I need some help with coding

So I am really a beginner and I have been trying to complete the TANKS 3D tutorial to some kind get a hang of the coding and game-making in general. However, I have ran into some problems related to coding. Been working with the Tank Movement script, and although I've been completely following the tutorial (or at least I think I have) some bugs in the coding still showed up. I have been working hard to get around those but all I have managed to do was to cut to 3 bugs. Could anybody help me to fix this and provide some brief explanation? Thank you in advance.

 private void EngineAudio()
     {
         if (Mathf.Abs (m_MovementInputValue) < 0.1f && Mathf.Abs (m_MovementInputValue) < 0.1f)
 
             {
                 if (m_MovementAudio.clip == m_EngineDriving)
                 {
                     m_MovementAudio.clip = m_EngineIdling;
                     m_MovementAudio.pitch = Random.Range (m_OriginalPitch - m_PitchRange, m_OriginalPitch + m_PitchRange);
                     m_MovementAudio.Play ();
                 }
             }
 
 
 
                 else if (m_MovementAudio.clip == m_EngineIdling)
         {
             {
                     m_MovementAudio.clip = m_EngineDriving;
                     m_MovementAudio.pitch = Random.Range (m_OriginalPitch - m_PitchRange, m_OriginalPitch + m_PitchRange);
                     m_MovementAudio.Play () 
             }
             
     }

This one gives issue with the last bracket (Unexpected symbol)

 private void Move()
     {
         // Adjust the position of the tank based on the player's input.
             {    Vector3 movement = transform.forward * m_MovementInputValue * m_Speed * Time.deltaTime;
         m_Rigidbody.MovePosition (m_Rigidbody.position + movement);
 
             }
     }
 
 
     private void Turn()
     {
        
             {    float turn = m_TurnInputValue * m_TurnSpeed * Time.deltaTime;
 
         Quaternion turnRotation = Quaternion.Euler (0f, turn, 0f);
 
         m_Rigidbody.MoveRotation (m_Rigidbody.rotation * turnRotation); 
             }
     }
 }

This one has issue with the private symbol in the beggining. (Unexpected symbol 'private, though there are several other 'private ' symbols which seem to work well.