Explain briefly object modeling, dynamic modeling and functional modeling with the help of suitable diagrams.

In Object-Oriented Analysis and Design (OOAD), three primary models are used to understand and represent a system: object modeling, dynamic modeling, and functional modeling. Each modeling type captures a specific aspect of the system and helps in developing robust software systems through abstraction and visualization. These models work together to provide a complete representation of the system under development.

Object Modeling:

Object modeling focuses on identifying the static structure of a system in terms of objects, classes, their attributes, methods, and relationships. It is represented using class diagrams. In this model, the system is analyzed in terms of real-world entities (objects) and their interactions. Each object belongs to a class, which defines its properties and behaviors.

For example, in a Library Management System, classes such as `Book`, `Member`, and `Librarian` are identified. The `Book` class may have attributes like `title`, `author`, and `ISBN`, and operations like `issue()` and `return()`. Relationships among classes such as association, generalization, and aggregation are also represented in the object model.

Diagram:

```
+------------+       +-----------+       +-------------+
|   Member   |<----->|   Book    |<----->|  Librarian  |
+------------+       +-----------+       +-------------+
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