Which of the following individuals may be exempt from the requirement to hold a private investigator license under PSISA?

1. An individual who offers their investigative services to the general public for a fee.
2. An individual working for a private investigation agency as a sub-contractor.
3. An individual contracted by an insurance company to investigate claims against its policyholders.
4. An individual employed by a company solely to conduct internal investigations into employee misconduct for that same company.