(a)Permissive joinder. All persons may join in oneaction as plaintiffs if they assert any right to relief jointly, severally, orin the alternative in respect of or arising out of the same transaction,occurrence, or series of transactions or occurrences and if any question of lawor fact common to all of them will arise in the action. All persons may bejoined in one action as defendants if there is asserted against them jointly,severally, or in the alternative, any right to relief in respect of or arisingout of the same transaction, occurrence, or series of transactions oroccurrences and if any question of law or fact common to all of them will arisein the action. A plaintiff or defendant need not be interested in obtaining ordefending against all the relief demanded. Judgment may be given for one ormore of the plaintiffs according to their respective rights to relief, andagainst one or more defendants according to their respective liabilities.
(b)Separate trials. The court may make such ordersas will prevent a party from being embarrassed, delayed, or put to expense bythe inclusion of a party against whom he asserts no claim and who asserts noclaim against him, and may order separate trials or make other orders toprevent delay or prejudice.