1. A,B and C are solidarily indebted to D for P 30,000. E however, remitted or renounced A's share. Therefore, on the due date, B paid D only P 20,000. Can B ask for reimbursements from A? Why? 2. A made a promissory note in B's favor. A, however, alleged that the cause was his gambling losses in a prohibited game Who has the burden of proving that the game was indeed a prohibited one? Why