1. X and Y executed a contract for the purchase of the latter's lot by installment with an agreement that ownership of which shall be transferred upon full payment of the purchase price. X failed to pay the last 4 installments. Can the contract entered into by X and Y be rescinded? 2. X left his valuable things and jewelries inside his room at ABC Hotel. Upon his return some of the jewelries were already missing, thus, X reported it to ABC Hotel management. ABC Hotel denies liability due to notices posted inside the hotel that the management is not liable for the articles brought by the guest. A. Is ABC Hotel's contention tenable? B. When does the keepers of hotels or inns are not liable for loss of thing in case of deposit? 3. Z owns a vehicle which he left to Y for safekeeping. Y then offered the said vehicle to X as security for the payment of his debt. When Z came back and learned that the vehicle was in the custody of X, he demanded its return. X, however, refused and alleged that the vehicle was pledged to him, and in the alternative, the vehicle was left with him in the concept of deposit and he may validly hold on to it until Y pays his obligation. ls X's contention, correct