Design a database (model and schemas) for a salon appointment booking service

This project is to design completely a database for a beautician, parlour and spa booking service (API, Web, Mobile). To complete the database design, you will need to perform: 1) Requirements Analysis (I will give you my thoughts and sketches, but you need to build on those with your experience in case I have missed something) 2) Organise or structure the data as needed 3) Recommend a document or relational database for the data (Mongo/Postgres) with justification 4) Identify Primary Keys, Relationships etc to create a physical schema both for relational and document-oriented database The deliverables are: 1) Entity–relationship models (ER models) at high and detailed level 1a) Conceptual & logical data models 1b) Physical data model 2) Database Schemas for: 2a) MongoDB 2b) RDBMS/MySQL 3) Sample Optimal Queries for few usual complex tasks 3a) Eg. (location based search ranked on some parameters and filters), etc The database will be used via an API by the various apps