Woo Restaurant Design

Design a Woo Restaurant system. You need to design a system to manage table reservations at Woo Restaurant. Requirements: Support adding, deleting, and updating tables. Support creating, deleting, and updating reservations. Support querying available tables for a specific time range. Assumptions: The restaurant contains tables of different sizes. Each table has a fixed number of seats. Provide an API design and implement the logic for the API. Please demonstrate how to handle concurrent requests. Provide code implementation and include sufficient test cases. Example Input 1, 4 2, 6 1, 1, '2023-10-01 18:00', '2023-10-01 20:00' '2023-10-01 19:00', '2023-10-01 21:00'