'float' does not contain a definition for 'x'

var md = new Vector2(Input.GetAxisRaw("Mouse X"), Input.GetAxisRaw("Mouse Y"));

     md = Vector2.Scale(md, new Vector2(sensitivity * smoothing, sensitivity * smoothing));
     smoothV.x = Mathf.Lerp(smoothV.x, md.x, if / smoothing);
     smoothV.y = Mathf.Lerp(smoothV.y, md.y, if / smoothing);
     MouseLook += smoothV;