Case 1: Andrei borrowed money from Brayne, and pledged a ring with diamonds as security. They agreed that Andrei was to pay the money borrowed with interest at the end of one year. Is Andrei allowed to pay his debt and recover the ring pledged before the expiration of the one-year period?

Case 2: The defendants, as partners in the management of a coffee shop, owed the plaintiff the amount of P100,000. The trial court ordered each of the defendants liablefor the whole amount (in solidum). Partner A appealed this point. Is Partner A's appeal valid? If yes, on what legal basis?

Case 3: Annie, Benny, and Ceddy are jointly liable to give a particular vehicle worth P1.2 million in favor of Danny, Elly, Fely, and Gelly. Aannie is insolvent so the debtors cannot purchase the car to give to the creditors. Danny and Elly have renounced their rights. The debtors are not in default. How much can each of the creditors get from each of the debtors?

Case 4: Ally, Billy, Cely, Dely, and Elly borrowed money from Fely. The contract stipulated a solidary one, but the debtors were bound under different terms and conditions. Fely brought an action to recover from Ally, whose obligation was already due. Ally claims that she cannot be made to pay because the obligations incurred by his solidary co-debtors were not yet due. In a solidary obligation wherein the debtors are bound by different terms and conditions, may the creditor sue one of them? Explainyour answer thoroughly.

Case 5: Santos and Co. sold an equipment to the defendant Burgos for P100,000 payable in quarterly installments of P10,000 each. The equipment was made security for the debt. Shortly after delivery to Burgos, the equipment and the money for its quarterly payment were both lost in a fire which completely demolished the company's building. Is the buyer still liable? Why? If yes, when should he pay? Give the right/s of the creditor.

Case 6: Alex promises to give Ben a particular computer or a specific necklace or a definite camera. May Alex compel Ben to accept half the computer and half the necklace, thus establishing co-ownership between Alex and Ben?

Case 7: The parties concurred that if in a contract of loan the borrower cannot pay the indebtedness on the date agreed upon, the debtor should mortgage a parcel of land to secure the debt. Define and describe this kind of obligation.