'transform' is not a member of 'Object' code problem

I'm currently trying to do a basketball game where the basketball instantiates at a certain position after the player presses the "shoot" key. The problem is I get this error message when compiling 'transform' is not a member of 'Object'

Here's the code:

 var newball;
 
 static var tempBasketBall: Rigidbody;
 
 var pos: Transform[];
 
 var ball1: Rigidbody;
 var ball2: Rigidbody;
 var ball3: Rigidbody;
 
 var canControl1 = true;            
 var canControl2 = true;
 var canControl3 = true;
 
 var destroyTime: int = 6;        
 
 var player1: GameObject;        
 var player2: GameObject;
 var player3: GameObject;
 
 var b1Parent: Transform;        
 var b2Parent: Transform;
 var b3Parent: Transform;
 
 var yVelocity: float;            
 var zVelocity: float;            
 
 
 function Start () 
 {
     ball1 = Instantiate(tempBasketBall, pos[0].position, pos[0].rotation);
     ball2 = Instantiate(tempBasketBall, pos[1].position, pos[1].rotation);
     ball3 = Instantiate(tempBasketBall, pos[2].position, pos[2].rotation);
 }
 
 function Update () 
 {
     if(Input.GetButtonUp("Player1") &&canControl1)
     {
         ball1.useGravity = true;
         ball1.velocity = transform.TransformDirection(0, yVelocity, zVelocity);
         MakeBall1(pos[0]);
         canControl1 = false;
     }
 }
 
 function MakeBall1(pos)
 {
     yield new WaitForSeconds(1);
     ball1 = Instantiate(tempBasketBall, pos.transform.position, pos.transform.rotation);
     
     canControl1 = true;
 }

The error points out to the instantiate section of the MakeBall1 function. How do I fix this? Help

Thanks in advance