Final answer:
When dealing with an underperforming intern with a gambling problem, confront them privately and offer support for their gambling issue.
Step-by-step explanation:
When dealing with an intern who is not pulling their weight, it is important to handle the situation in a professional and empathetic manner. In this case, where the intern has a gambling problem, the most appropriate course of action would be to confront the intern privately and offer support for their gambling issue (Option 1).
Start by expressing your concerns about the intern's performance and explain the impact their underperformance is having on the team. Then, mention that you noticed they may be dealing with a gambling problem and let them know that you are willing to provide support and resources to help them overcome this issue.
Keeping the information confidential and trying to handle it yourself (Option 4) may not be the best approach, as the intern may require professional help and support to address their gambling addiction.