Strange Parsing Error

So I am making a game using the "Let's Try Assignments" course and instead of hurting the blocks I just apply force. I want to apply a positive force to push when left mouse is pressed, and a negative to pull when right mouse is pressed. The left mouse is functional and I tried to copy and paste the script over and change around some variables, inputs, and what not and I believe I got it working, however the sound and visuals have a parsing error after I triple checked my script. It says that I also have an error with putting private in front of IENumerator but I think that's because of the parsing error. Here is the whole script, the last part is the part where the parsing error is, but I will include it all because I might have to change something else.

 using UnityEngine;
 using System.Collections;
 
 public class RaycastShootComplete : MonoBehaviour {
 
     public int gunDamage = 1;                                            // Set the number of hitpoints that this gun will take away from shot objects with a health script
     public float fireRate = 0.25f;                                        // Number in seconds which controls how often the player can fire
     public float weaponRange = 50f;                                        // Distance in Unity units over which the player can fire
     private float neghitForce;                                            // Amount of force which will be added to objects with a rigidbody pulled by the player
     public float hitForce = 100000f;                                    // Amount of force which will be added to objects with a rigidbody shot by the player
     public Transform gunEnd;                                            // Holds a reference to the gun end object, marking the muzzle location of the gun
 
     private Camera fpsCam;                                                // Holds a reference to the first person camera
     private WaitForSeconds shotDuration = new WaitForSeconds(0.07f);    // WaitForSeconds object used by our ShotEffect coroutine, determines time laser line will remain visible
     private AudioSource gunAudio;                                        // Reference to the audio source which will play our shooting sound effect
     private LineRenderer laserLine;                                        // Reference to the LineRenderer component which will display our laserline
     private float nextFire;                                                // Float to store the time the player will be allowed to fire again, after firing
 
     void Start () 
     {
         // Get and store a reference to our LineRenderer component
         laserLine = GetComponent<LineRenderer>();
 
         // Get and store a reference to our AudioSource component
         gunAudio = GetComponent<AudioSource>();
 
         // Get and store a reference to our Camera by searching this GameObject and its parents
         fpsCam = GetComponentInParent<Camera>();
     }
     
 
     void Update () 
     {
         // Check if the player has pressed the fire button and if enough time has elapsed since they last fired
         if (Input.GetButtonDown("Fire1") && Time.time > nextFire) 
         {
             // Update the time when our player can fire next
             nextFire = Time.time + fireRate;
 
             // Start our ShotEffect coroutine to turn our laser line on and off
             StartCoroutine (ShotEffect());
 
             // Create a vector at the center of our camera's viewport
             Vector3 rayOrigin = fpsCam.ViewportToWorldPoint (new Vector3(0.5f, 0.5f, 0.0f));
 
             // Declare a raycast hit to store information about what our raycast has hit
             RaycastHit hit;
 
             // Set the start position for our visual effect for our laser to the position of gunEnd
             laserLine.SetPosition (0, gunEnd.position);
 
             // Check if our raycast has hit anything
             if (Physics.Raycast (rayOrigin, fpsCam.transform.forward, out hit, weaponRange))
             {
                 // Set the end position for our laser line 
                 laserLine.SetPosition (1, hit.point);
 
                 // Get a reference to a health script attached to the collider we hit
                 ShootableBox health = hit.collider.GetComponent<ShootableBox>();
 
                 // If there was a health script attached
                 if (health != null)
                 {
                     // Call the damage function of that script, passing in our gunDamage variable
                     health.Damage (gunDamage);
                 }
 
                 // Check if the object we hit has a rigidbody attached
                 if (hit.rigidbody != null)
                 {
                     // Add force to the rigidbody we hit, in the direction from which it was hit
                     hit.rigidbody.AddForce (-hit.normal * hitForce);
                 }
             }
             if (Input.GetButtonDown("Fire2") && Time.time > nextFire) 
             {
                 // Update the time when our player can fire next
                 nextFire = Time.time + fireRate;
 
                 // Start our ShotEffect coroutine to turn our laser line on and off
                 StartCoroutine (ShotEffect());
 
                 // Create a vector at the center of our camera's viewport
                 Vector3 rayOrigin2 = fpsCam.ViewportToWorldPoint (new Vector3(0.5f, 0.5f, 0.0f));
 
                 // Declare a raycast hit to store information about what our raycast has hit
                 RaycastHit hit2;
 
                 // Set the start position for our visual effect for our laser to the position of gunEnd
                 laserLine.SetPosition (0, gunEnd.position);
 
                 // Check if our raycast has hit anything
                 if (Physics.Raycast (rayOrigin, fpsCam.transform.forward, out hit2, weaponRange))
                 {
                     // Set the end position for our laser line 
                     laserLine.SetPosition (1, hit2.point);
 
                     // Get a reference to a health script attached to the collider we hit
                     ShootableBox health = hit2.collider.GetComponent<ShootableBox>();
 
                     // If there was a health script attached
                     if (health != null)
                     {
                         // Call the damage function of that script, passing in our gunDamage variable
                         health.Damage (gunDamage);
                     }
 
                     // Check if the object we hit has a rigidbody attached
                     if (hit2.rigidbody != null)
                     {
                         // Add pulling force to the rigidbody we hit, in the direction from which it was hit
                         hit2.rigidbody.AddForce (-hit2.normal * neghitForce);
                     }
                 }
             {
                 // If we did not hit anything, set the end of the line to a position directly in front of the camera at the distance of weaponRange
                 laserLine.SetPosition (1, rayOrigin + (fpsCam.transform.forward * weaponRange));
             }
         }
 
 
             IEnumerator ShotEffect;
             {
                 // Play the shooting sound effect
                 gunAudio.Play ();
 
                 // Turn on our line renderer
                 laserLine.enabled = true;
 
                 //Wait for .07 seconds
                 yield return shotDuration;
 
                 // Deactivate our line renderer after waiting
             laserLine.enabled = false;            
             }

The error code is (135,25): error CS8025: Parsing error (which is that last line)

Can replies be in C# only? Please tell me how to fix :) thx.