still have some problems with c# AI

posted before and got some help but still have a couple of problems. just trying to get the AI follow my player. these are the errors im getting:

Assets/AIfollow.cs(25,51): error CS1501: No overload for method Slerp' takes 1' arguments

Assets/AIfollow.cs(26,36): error CS0117: UnityEngine.Quaternion' does not contain a definition for rotation'

here is my script:

 using UnityEngine;
 using System.Collections;
 
 public class AIfollow : MonoBehaviour {
 
     private Transform myTransform; //current transform data of this enemy
     private Transform target; //the enemy's target
     private int moveSpeed = 3; //move speed
     private int rotationSpeed = 3; //speed of turning
  
         
         void Awake()
         {
             myTransform = transform; //cache transform data for easy access/preformance
         }
  
         void Start()
         {
                 target = GameObject.FindWithTag("AIattack").transform; //target the player
          }
  
         void Update () {
         
         //rotate to look at the player
             myTransform.rotation = Quaternion.Slerp(myTransform.rotation);
              Quaternion.rotation((target.position - myTransform.position), (rotationSpeed*Time.deltaTime));
  
         //move towards the player
             myTransform.position += myTransform.forward * moveSpeed * Time.deltaTime;
  }
 }