Please help me solve the attached problems.

Thank you.

3. X promises to give P10,000 to Y, if the latter will graduate from college magna cumlaude. On June 30, 2022, Y graduated from college cumlaude, Can Y demand the payment of P 10,000 from X ? 4. X, a developer was contracted by H to construct a house, provided that the roof should not be extended beyond the walls. However, despite repeated warning from H,X extended the roof beyond the wall. Can H demand from X to remove the roofing 1. X by mistake delivered to A, a sum of money (P5,000.00) which should have been delivered to B. Can X demand the return of the said amount from A ? or is A liable to refurn the said sum of money? 2. X migrated to the U.S.A leaving no one to manage the property. A took charge of the management of the said property and built a swimming in the said property. Can A demand for the reimbursement of the expenses paid for the swimming pool