A:

• That there was a defect in the product manufactured and sold by the defendant,
  

  The defect made the product unreasonably dangerous to the user or consumer;

  The defect existed at the time the product left the hands of the defendant;

  The product was one that the seller expected to reach and did reach the user or consumer without substantial change in its condition when it was sold by the seller; and

  The defect was a direct and proximate cause of the plaintiff's injuries or loss.