Letgo which is now part of offer up is an application that allows individuals to sell and buy mainly used products. Users can buy/sell using the web-based application and/or the mobile app which is available on android and iOS. A user can create an account that allow him/her to access functionalities related to both buying and selling from the same account. Users who want to sell products can upload pictures of the items they want to sell and set the price they are asking for. User who want to buy products can search for items using a variety of filters including price and distance. Buyers and sellers can interact using a built-in messaging system. Part 1 [40 Points] 1. Based on the information you have gathered about the mobile app, create a domain model class diagram showing domain classes associations with multiplicity. (40 points)