2D bullet script errors.

I'm currently trying to make a 2d game that allows the player to spawn and launch a bullet, however i'm getting a couple of errors. Specifically the errors are:

"Assets/RangedAttack.cs(26,61): error CS1525: Unexpected symbol `launcher'"

and

"Assets/RangedAttack.cs(54,1): error CS8025: Parsing error"

Any and all help will be greatly appreciated, here is my code:

 using UnityEngine;
 
 public class RangedAttack
 {
     public Bullet bullet;                // reference to bullet prefab to launch
     
     public AttackContext contextStand;         // when attacking while standing
     public AttackContext contextInAir;         // when attacking while in air
     
     public enum ContextId
     {
         eStand = 0,
         eInAir
     }
     
     public class AttackContext
     {
         public string anim = string.Empty;             // animation state name
         public Vector2 bulletStartPosition;            // spawn position of bullet
         public float bulletDirection;                // launch direction
     }
 void update()
 {    
     if (CrossPlatformInput.GetButtonDown("z"))
     {
          FireBullet(UFGPlatformerCharacter2D launcher, ContextId contextId)
         {    
             AttackContext curContext = contextStand;
             switch(contextId)
             {
             case ContextId.eRun: curContext = contextRun; break;
             case ContextId.eInAir: curContext = contextInAir; break;
             }
             
             // make sure move horizontal direction is valid
             float fAngle = Mathf.Deg2Rad * curContext.bulletDirection;
             Vector2 v2MoveDir = new Vector2(Mathf.Cos(fAngle), -Mathf.Sin(fAngle));
             if(launcher.GetMotor().faceRight && v2MoveDir.x < 0f || !launcher.GetMotor().faceRight && v2MoveDir.x > 0f)
             {
                 v2MoveDir.x = -v2MoveDir.x;
             }
             
             // spawn and launch bullet (add player velocity before spawn)
             Vector2 pointPos = launcher.transform.TransformPoint(curContext.bulletStartPosition);
             pointPos = pointPos + (Time.deltaTime * launcher.GetMotor().velocity);
             Bullet newBullet = (Bullet)UnityEngine.Object.Instantiate(bullet, pointPos, Quaternion.identity);
             
             // initiate bullet
             v2MoveDir = launcher.transform.TransformDirection(v2MoveDir);
             newBullet.Setup(launcher, pointPos, v2MoveDir);
             }
         }
     }
 }