someone please help with my C# parsing error

hi everyone. please go easy on me. this is my FIRST attempt at using C#. i'm not sitting here claiming to know anything about it; i'm simply following the steps in a book.

can you please EXPLAIN my error as if i'm an idiot please. i feel as if i have typed it in exactly as the book has told me to but i get a parsing error message when attempting to play.

here is the code as i typed it in:

 using UnityEngine;  
 using System.Collections;  
 public class Shooter : MonoBehaviour {  
 public Rigidbody bullet;  
 public float power = 1500f;  
     public float moveSpeed = 2f;   
     
     void Update () {  
         float h = Input.GetAxis("Horizontal") * Time.deltaTime * moveSpeed;  
         float v = Input.GetAxis("Vertical") * Time.deltaTime * moveSpeed;  
             
         transform.Translate(h, v, 0);  
         if (Input.GetButtonUp ("Fire1")){
             Rigidbody instance = Instantiate(bullet, transform.position, transform.rotation) as Rigidbody;  
             Vector3 fwd = transform.TransformDirection(Vector3.forward);
             Instance.addforce(fwd * power);   
     
     }  
 }