How to make my camera follow the ball smoothly, because when the players touch the camera is not really stable

using UnityEngine; using System.Collections;

public class Camera_Script : MonoBehaviour {

 private bool isTriggering = false;
 private float distanceAdder = 0.0f;
 private float distanceAdder2 = 0.0f;
 private bool isExit = false;
 public Transform target;
 
 public Vector3 targetOffsetPos;
 private Vector3 oldPos;    
 
 // Use this for initialization
 void Start () {
 
 }
 
 // Update is called once per frame
 void LateUpdate () {
 
     
     if ( GetComponent<InGameState_Script>().state == InGameState_Script.InGameState.PLAYING 
         || GetComponent<InGameState_Script>().state == InGameState_Script.InGameState.Run
         || GetComponent<InGameState_Script>().state == InGameState_Script.InGameState.Remove) {
         oldPos = transform.position;
         Vector3 newPos = new Vector3( target.position.x+targetOffsetPos.x, target.position.y+targetOffsetPos.y, target.position.z+targetOffsetPos.z );
         
         float lerpX =  Mathf.Lerp( oldPos.x, newPos.x,  0.05f );
         float lerpY =  Mathf.Lerp( oldPos.y, newPos.y,  0.05f );
         float lerpZ =  Mathf.Lerp( oldPos.z, newPos.z,  0.05f );
         
         transform.position = new Vector3( lerpX, lerpY, lerpZ );            transform.LookAt( target );
     }
     
     if ( GetComponent<InGameState_Script>().state == InGameState_Script.InGameState.CORNER_1
         || GetComponent<InGameState_Script>().state == InGameState_Script.InGameState.CORNER) {
     
     
         GameObject lanzador = GetComponent<InGameState_Script>().candidateToKick;
     
         if ( lanzador ) {
         
             transform.position = lanzador.transform.position - lanzador.transform.forward*15.0f + lanzador.transform.up*3.0f ;
             transform.LookAt( target );
         
         }
         
     
     }        
     
 }

}