Need Ideas for my college project on Restaurant Point of Sale..I mean my intention is to use salesforce lightning,Apex programming to achieve below features in my dev org.

Can anyone suggest me what should be my approach to achieve below functionalities namely A),B) and C) below,if you can go detailed steps,would be really grateful.Want to keep this thread a living document for others who wish to develop such project in future.

A) Inventory management:
-->Here i want to manage ingredient level inventory in real-time and start restocking at the right levels

B) Online Ordering:
-->Here i want customer can send order tickets straight to the kitchen

C) Table Management:
-->Here i want on-table ordering that allows restaurant customers to order food from android phone
-->Give feedback right from the table without having to wait for restaurant staff