Arduino Button Answer Device

I want to create a small, self-contained answer device that my students can use in class quizzes. The idea is straightforward: each learner presses one of several momentary push-buttons to submit an answer, and an LED display immediately shows the chosen option (and later, whether it was correct). Everything should live on a breadboard and run from a standard 5 V supply, driven by a readily available Arduino board.

Here’s what I need from you:

• A clear, annotated schematic and breadboard layout showing the Arduino, the push-buttons, current-limiting resistors, and the LED display (a single 7-segment or a compact multi-digit module—whichever you feel is most efficient).
• A thoroughly commented Arduino sketch that:
– debounces the buttons,
– updates the LED display in under half a second,
– lets me set or change the “correct” answer in code, and
– can reset between rounds with a long-press or power-cycle.
• A concise parts list with exact component names or links so I can order identical items.
• Photos—or a brief video—of your breadboard prototype in action to confirm the build works before I reproduce it.

Acceptance criteria:
• Button presses are registered accurately every time.
• The code compiles without warnings in the latest Arduino IDE.
• Only widely available, low-cost components are used.

If you can also suggest a simple enclosure or power-saving tweak, that’s a bonus, but the core goal is a reliable educational tool built around buttons and an LED display. I’m ready to start as soon as you are.