题目:Object-oriented analysis (OOA) is a semiformal specification technique for the object-oriented paradigm. Object-oriented analysis consists of three steps. The first step is focused on determining the computational results of the product and presenting this information in the form of a _______ and associated scenarios. The second step involves _______ to determine classes and their attributes, as well as the interrelationships and interaction among them. The last step is about _______,which determines the actions of each class or subclass and presents this information in a specific format.
请从以下选项中选择正确的填空答案。