Final answer:
Agent Brandy would need Seller Jair to sign the Residential Listing Agreement to create a relationship and sell the subject property.
Step-by-step explanation:
Agent Brandy would need to have Seller Jair sign the Residential Listing Agreement in order to create a relationship and sell the subject property. This agreement outlines the terms and conditions under which Agent Brandy will list and market the property on behalf of Seller Jair. It also specifies the commission that Agent Brandy will receive upon a successful sale.