Answer: See explanation
Step-by-step explanation:
1. Yes.
A design defect is when the design for a particular product brings about risk or injury which could have been averted if the design was done in another way.
With regard to the question, there is a design defect as we're informed that the drain cover becomes loose and we're further told that Sta-Rite did not install safety features on its drain pumps.
2. No.
Based on the scenario in the question, the ethical duty wasn't met by Sta-Rite Industries. They neglected the potential injury and harm that their design would cause. This means that they didn't perform their ethical duty well.
3. Yes.
In this case, Sta-Rite has to compensate the affected person and a punitive damage should further be added to whatever compensation had been put in place. This will serve as a way of making others also learn and always do the right thing and be safety conscious.