Final answer:
Samuel's role is that of a disclosed dual agent, where he represents both the seller and the buyer in a real estate transaction, ensuring a fair and transparent negotiation.
Step-by-step explanation:
When Samuel acts as an agent for both the seller, Matilda, and the buyer, Juan, his role is known as a disclosed dual agent. This is possible because both parties have given consent and Samuel's agency allows this practice. As a disclosed dual agent, Samuel must negotiate the deal fairly and impartially, providing both parties with all the necessary information and ensuring that their interests are represented without bias. He must not disclose confidential information from one party to the other without permission. It's a delicate balance of duty, requiring a high level of transparency and ethical behavior to ensure that both the seller's and buyer's interests are protected.