BASE ON PHILIPPINE SETTING. EXPLAIN YOUR ANSWER BASE ON PHILIPPINE LAW

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