JAVA

An auction company wants to write software to keep track of bids and items which are being sold. Bidders can be either in person or online. An auctioneer evaluates an items worth before an auction and announces the winner of each auction.

Draw a UML class diagram of the classes that could be used in this solution, including relationships. Assume a bidder has an id and a name. Assume online/in person bidders are subtypes of bidder. Assume an item can be either a painting or a vase. A painting stores information about the painter. A vase stores information about the colour. An auctioneer keeps track of the items within the auction.