3. A promised to marry his boyfriend, B, on B's 30th birthday. When the day came, A and B made all the wedding preparations and paid for all costs. During the ceremony, just when A was being asked by the priest whether A would take B to be her husband, to live together in holy matrimony, to love him, to honor him, to comfort him, and to keep him in sickness and in health, forsaking all others, for as long as you both shall live, A suddenly cried and ran away with his longtime friend waiting at the entrance of the church. Is A liable? If yes, what are the sources of her obligation? 4. A, B, and C loaned P9,000 from X, Y, and Z. a. How much is the liability of A to Z? b. If the obligation is solidary, how much is the liability of B to Y? 5. A is liable to B for P10,000 payable July 2022. B is liable to A for P15,000 payable August 2022. a. How much is the liability of A? b. How much is the liability of B