negligence case cannot be won unless the plaintiff shows that the defendant has breached a duty and that the defendant's breach has actually and proximately caused the damage complained of$.$ What, exacthy, is the alleged breach of duty by the defendant here?

$2.$ Explain why Judge Gadola reasening that $1.P$ had no duty to wam in this case. After this case, would they then have a duty to warn, knowing that someone might use their product in this wray?