1 . Diana owes Jerry Php 100,000. Complete the given problem in order to show how the obligation is extinguished by: a Merger b. Compensation C. Novation d. Condonation e. Payment 2. Josie borrowed Php 50,000 from Billy. Moody is the guarantor of Josie. a. Is there a valid payment if Moody pays the obligation of Josie? b . Supposed, Moody will pay the obligation. What is/are the effects of such payment? C. Supposed the loan was secured by a mortgage on Josie's property and Moody paid. Moody cannot collect Josie the amount paid. Can she foreclose the mortgage? 3. Anne (seller) and Gilbert (buyer) entered into a contract of sale of Toyota Vios for Php 1 million. a. There is a stipulation in the contract that Gilbert can declare the contract invalid. Is the stipulation valid? b . Explain the legality of the contract if Gilbert is insane 4. Anne and Gilbert entered into a contract of mortgage but they made it appear to be a Deed of Sale. In the Deed of Sale, the buyer is Pedro (mortgagee). Subsequently, Anne sold the land to Mario. Explain the legality of the contract between the parties. 5. Anne and Gilbert entered into a contract of sale orally involving the land owned by Pedro for Php 150,000. Juan the buyer, paid Php 100,000. a. Is the contract valid and enforceable? b. Is the contract required to be in a public instrument