2. In a desperate attempt to dispose of her assets, X, a fugitive from justice, called her friend, Y, instructing him to sell her house and lot located at Forbes Park to the first interested buyer for not less than PHP 250 million. Y offered the property for sale to his boss, Z. Enticed by the offer, Z asked Y for a copy of the title and proof of Y’s authority to sell the property. Y presented the title of the property, claiming that his possession of the title was sufficient proof of his authority to sell the property. Relying on the representation of Y, Z bought the property from Y, the agent of X. Is the sale valid? Reason(s).