Which task is Justin permitted to perform for an unrepresented buyer?

Justin is permitted to explain to a buyer the purpose of the seller's property disclosure because this task involves providing factual information and helping the buyer understand an important document in the transaction process. Property disclosures are typically used to inform potential buyers about the condition of the property and any known issues, which is crucial for making informed decisions.

While preparing an offer, negotiating the price, or providing legal advice delves deeper into the realms of legal representation and negotiation strategies, which are typically reserved for licensed real estate professionals or attorneys. These tasks could lead to potential legal liability or require a license that Justin might not possess, especially when dealing with an unrepresented buyer. Thus, explaining the purpose of the seller's property disclosure is a straightforward, informative task that aligns with the duties of a real estate professional without crossing into legal or negotiation territory.