Orbit Controls - Simple Zoom in and Zoom out

Questions
3

So I ended up doing this after hours of reking my brain:

Zoom Out:

  ////Original Controls.target Position: controls.target.set(0, 0, 0);
  //Original Camera Position: camera.position.set(0, 0, 0);
   var tweenDuration=2000;
    function panCam(xTarget,yTarget,zTarget,tweenDuration){
    controls.enabled = false;
     
     var camNewPosition= { x : 0, y : 0, z : 0};
      var targetNewPos = {x : 0, y : 0, z : 0};

      var camTween = new TWEEN.Tween(camera.position).to(camNewPosition, tweenDuration).easing(TWEEN.Easing.Quadratic.In)
       .onComplete(function() {
           camera.position.copy(camNewPosition);
        })
      .start();
      var targetTween = new TWEEN.Tween(controls.target).to(targetNewPos, tweenDuration).easing(TWEEN.Easing.Quadratic.In)
        .onComplete(function() {
            controls.target.copy(targetNewPos);
            })
      .start();
        }
 panCam(0,0,0,1000);

Zoom In:

controls.enabled = false;
        var xTarget=0;
        var yTarget=-0.7;
        var zTarget=-1.65;
        var tweenDuration=2000;

        function panCam(xTarget,yTarget,zTarget,tweenDuration){

          var camNewPosition= { x : xTarget, y : yTarget, z : zTarget};
          var targetNewPos = {x : xTarget, y : yTarget, z : -1.65};

          var camTween = new TWEEN.Tween(camera.position).to(camNewPosition, tweenDuration).easing(TWEEN.Easing.Quadratic.Out)
           .onComplete(function() {
               camera.position.copy(camNewPosition);
           
            })
          .start();
          var targetTween = new TWEEN.Tween(controls.target).to(targetNewPos, tweenDuration).easing(TWEEN.Easing.Quadratic.Out)
            .onComplete(function() {
                controls.target.copy(targetNewPos);
                })
          .start();
          }
    panCam(0,-0.7,-1.65,800);

Hope this helps someone as it seems to be the only solution that worked for me