based on Philippine Law on Obligation and Contracts 1. Pedro owes Jose P20,000.00. Both are house painters. It was agreed that Pedro instead of paying Jose, will paint the house of Magda to which Magda expressed her conformity to Jose whose service as painter was previously contracted by her. 1.1 Has Maria, Magda's best friend, the right to enforce the stipulation between Jose and Pedro? 1.2Will your answer be the same if it was Magda who demands fulfillment of the stipulation? 2. Magda gave P20,000.00 to Maria who signed a receipt stating: "This is to acknowledge payment by Magda in the amount of P20,000.00." Magda later complains that she received nothing from Maria for the P20,000.00. Is Maria bound to return the P20,000.00? 3.In a contract stating "Sold to Pedro for P200,000.00 a parcel of land belonging to Jose in my hometown." Is the sale valid