Answer:
No, the internship cannot be unpaid.
Explanation:
No, the internship cannot be unpaid as the French and Farthing deriving the benefit from the work of Bernadette.
Internship will be unpaid if the intern is the main beneficiary from the internship but in this scenario, as the secretary is on leave so the company requires the Bernadette services which will be the main benefit.
Therefore, the Bernadette will be paid for the same.