Create and Design an Online Auction System: A database management system to manage bidding, auctions, and sales of goods and services on an online platform.

Identify appropriate entities, relationships, attributes, domains, and keys:

i$.$e Identifying entities, relationships, attributes, domains, and keys:

$$ Identify the main entities involved in the online auction system, such as users, items,

auctions, sellers, etc. $($Minimum of $6$ entity types$)$

$$ Determine the relationships between these entities

$$ Define the attributes for each entity $($Must be as complete as possible$)$

$$ Determine the domains for each attribute, such as the data type, range of values, and constraints

$$ Identify the keys for each entity