How do I access two Scripts

I am having a problem accessing two scripts. I am get some errors . I trying to access MyClock script and ScoreManager Script from the PlayerPreference script. I am trying to do an if statement . I need to check for time and score in the if statement .Here is all three of my scripts.

using UnityEngine; using System.Collections; using UnityEngine.UI; using UnityEngine.SceneManagement;

public class PlayerPreference : MonoBehaviour { private ScoreManager scoreManagerScript; private MyClock MyClockScript;

 void Awake () 
 {
  ScoreManager = GetComponent<ScoreManagerScript>();
  MyClock = GetComponent<MyClockScript>();
 }
 

 void Update () 
 {
  if (m_leftTime >= &&   < score )
  {
      SceneManager.LoadScene("time");
      
  }
 
 }

using UnityEngine; using UnityEngine.UI; using UnityEngine.SceneManagement;

public class MyClock : MonoBehaviour { public string time; public int Minutes = 0; public int Seconds = 0;

   private Text    m_text;
   private float   m_leftTime;
  
   private void Start()
   {

       m_text = GetComponent<Text>();
       m_leftTime = GetInitialTime();
   }
  
   public void Update()
   {
       if (m_leftTime > 0f)
       {


           //  Update countdown clock
           m_leftTime -= Time.deltaTime;
           Minutes = GetLeftMinutes();
           Seconds = GetLeftSeconds();

           //  Show current clock
           if (m_leftTime > 0f)
           {
                             
               m_text.text = "Time : " + Minutes + ":" + Seconds.ToString("00");
           }
           else
           {
               //  The countdown clock has finished
               m_text.text = "Time : 0:00";
           }
       }
   }
  
   private float GetInitialTime()
   {
       return Minutes * 60f + Seconds;
   }
  
   private int GetLeftMinutes()
   {
       return Mathf.FloorToInt(m_leftTime / 60f);
   }
  
   private int GetLeftSeconds()
   {
       return Mathf.FloorToInt(m_leftTime % 60f);
   }

}

using UnityEngine; using System.Collections; using UnityEngine.UI;

public class ScoreManager : MonoBehaviour { public static int score; private Text text;

  void Awake () 
  {    
      text = GetComponent <Text> ();
      score = 0;


  
  }
 
  void Update ()
 {
          text.text = "Score :" + score;
      }
  
  

}