Three Schema Architecture and ER - Diagram

1. Design the Three Schema Architecture for a healthcare management system that tracks patients, doctors, appointments, and medical records. 2 Create an ER diagram for a blockchain-based voting platform. Include entities like voters, candidates, ballots, elections, and blockchain transactions. 3.Design an ER diagram for a cryptocurrency exchange platform where users can buy, sell, and track digital assets. Entities to include: Users, wallets, cryptocurrencies, transactions, orders, exchange rates, and trading pairs 4.Create an ER diagram for a VR gaming system that tracks users, games, scores, in-game purchases, and virtual avatars. Entities to include: Users, games, scores, avatars, in-game purchases, items, levels, and multiplayer sessions.