$**$Use Case Diagram:$**$In the Use Case Diagram for the BiblioConnect System, we have several actors and their corresponding use cases:$**$Actors:$**1.**$Patron:$**$ Represents users of the system who interact with library resources and social features$\mathrm{.}2.**$Librarian:$**$ Manages the library resources and assists patrons with their queries$\mathrm{.}3.**$Administrator:$**$ Responsible for system maintenance, user management, and overall system operation.$**$Use Cases:$**1.**$Manage Book$/$Catalog:$**-$ Actors: Librarian $-$ Description: Librarians can add, update, and categorize books in the library catalog$\mathrm{.}2.**$Manage Patron:$**-$ Actors: Librarian, Administrator $-$ Description: Librarians and administrators can maintain user accounts, track borrowing history, and manage patron interactions$\mathrm{.}3.**$Manage Transaction:$**-$ Actors: Librarian $-$ Description: Librarians facilitate borrowing and returns, ensuring smooth library operations$\mathrm{.}4.**$Manage User Profile:$**-$ Actors: Patron $-$ Description: Patrons can create and update their profiles, showcasing their favorite books and literary preferences$\mathrm{.}5.**$Social Interactions:$**-$ Actors: Patron $-$ Description: Patrons can interact with each other through posting messages, commenting, liking, and sharing content$\mathrm{.}6.**$Manage Groups and Discussions:$**-$ Actors: Patron $-$ Description: Patrons can join or create interest$-$based groups and participate in discussions on various literary topics$\mathrm{.}7.**$Manage Following and Followers:$**-$ Actors: Patron $-$ Description: Patrons can follow each other to stay updated on activities, recommendations, and discussions$\mathrm{.}8.**$Manage Events and Meetups:$**-$ Actors: Patron $-$ Description: Patrons can participate in literary events, book clubs, author signings, and other literary gatherings.$**$Interaction:$**-$ Patrons interact with various features such as managing their profiles, participating in social interactions, joining groups, and attending events.$-$ Librarians interact with the system to manage the library catalog, patron accounts, and transactions.$-$ Administrators interact with the system for overall system maintenance and user management.$**$Class Diagram and Structural Diagram:$**$In the Class Diagram and Structural Diagram, we have components representing various aspects of the system and their relationships:$1.**$Book$/$Catalog Management:$**-$ Classes: Book, Catalog $-$ Relationships: The Catalog class aggregates instances of the Book class to represent the library's collection$\mathrm{.}2.**$Patron Management:$**-$ Classes: Patron, Account $-$ Relationships: The Account class represents user accounts associated with the Patron class to manage interactions and borrowing history$\mathrm{.}3.**$Transaction Management:$**-$ Classes: Transaction, Borrowing, Return $-$ Relationships: The Transaction class manages borrowing and return processes, associated with Patron and Book to track borrowing history$\mathrm{.}4.**$Social Network Management:$**-$ Classes: User, Profile, Post, Comment, Group, Event $-$ Relationships: Users interact with various components such as posts, comments, groups, and events to engage in social activities related to reading and learning$\mathrm{.}5.**$Following and Followers:$**-$ Classes: Follow, Follower $-$ Relationships: Users can follow each other, creating a relationship to stay updated on activities and recommendations.These diagrams illustrate how different components of the BiblioConnect System are organized and how they interact to provide users with access to library resources and social features, fostering a vibrant literary community.