In a scenario where an insured has overlapping coverage from multiple insurers, but one insurer is unaware of the duplication, what happens to the portion of premiums that correspond to disability insurance benefits that were not required? 1. The premiums are forfeited and cannot be refunded 2. The premiums are allocated to a reserve fund for potential losses 3. The proportionate amount of premiums is refunded to the insured 4. The insurer is fined $100 for not identifying the duplication