Brian was moving to Cairns, so appointed 'Thunder & Antlers, Real Estate' tomanage his house in Sydney. He discussed with them the weekly rent he desired, $600, and that no pets were to be allowed. He then authorized them to sign the appropriate lease documents on his behalf. Mr Lightning, a member of the real estate firm, found, after 3 months, a family willing to rent the property but who only offered $550 per week rent. He tried to contact Brian but was unable. As the house had been vacant for sometime, he got back to the family and said "Yes, $550 is fine." The lease was drawn up but Mr. Lightning innocently omitted reference to no pets as he had not read Brian's full written instructions. The familymoved in with 3 cats and 2 pet rats. Has the agent acted with authority? Discuss. Further does Brian have any action against Thunder and Antlers? Explain your answer referring to relevant law.