$1.$ Classroom Audio$/$Video Recorder Device: Design a smart classroom audio$/$video recording device that can automatically capture lectures, focusing on the instructor and capturing key content displayed on screens and the white$/$blackboard$.$ The device should provide features such as recording, enriched playback with picture$-$to$-$voice$/$text$-$ability, and data storage, with options for remote access and multi$-$classroom integration and accessibility.

$2.$ Window Cleaning Robot: Design an autonomous window cleaning robot that can efficiently clean windows of varying sizes and orientations $($vertical$,$ horizontal, or slanted$).$ The robot should include features such as obstacle detection, cleaning path optimization, and status reporting. Consider a modular design to accommodate future expansions, such as remote control or advanced AI functionalities.

Deliverables for questions $1$ and $2$:

$$ Product Requirement Specification $($High and Low level$).$

$$ Selected Use Case diagrams.

$$ UML diagrams: Class, sequence, and state diagrams $($if applicable$).$

$$ Use of appropriate design patterns.

$$ Modularity and scalability for future enhancements.

$$ Proper encapsulation and abstraction to manage complexity.

$$ Implement question $1$ or $2$

$$ Documentation: Explain the design choices, major classes, objects, functionality, and modules for the next development phase.

$$ Presentation of your work: Include a demo of core classes, modules, and design pattern$($s$)$ of the behavior of each of the products.