Based on the following business description, create a use case model. Your model should include:

$1.$ Use Case diagram

$2.$ Use case descriptions. Remember you$$ll need a use case description for each use case in the use case diagram. If you have three use cases on your diagram, you$$ll need three use case descriptions. If you have four use cases on the diagram, you$$ll need four use case descriptions.

BestArt $($BA$)$ Co$.,$ buy and sell paintings. BA need an information system that assists them in buying and selling paintings. Dealers buy virtually any paintings.

When a dealer buys a painting, they input details of the paintings they are considering buying. These are first name and last name of the artist, title of the work, year of the work, height, and width. The information system responds with the maximum purchase price the dealer should offer. If the seller accepts the dealer$$s offer to buy the painting, the dealer enters further details such as date of purchase, name of the seller, address of the seller, and actual purchase price. The information system then calculates the target selling price. Details of the algorithm for determining the maximum price and selling price will be obtained in the later stage. If the offer is not accepted, the transaction will be terminated and the information calculated will be saved for future use within the pricing service algorithm.

When a dealer sells a painting, the information system provides the dealer with the target selling price for the painting. If the buyer agrees, then the sale is completed and the dealer enters details such as date of sale, name of the buyer, address of the buyer, and actual sale price. If the buyer doesn$$t agree, the dealer is asked to reduce the selling price.

In addition, the company would like the system to detect new trends in the art market as soon as possible. They are particularly interested in determining when higher prices than expected are consistently paid for a particular artist$$s work, so that dealers can buy up paintings by that artist before others notice the trend. The system displays all artists whose works have been sold at a price that has exceeded the target selling price in every instance during the past year. At least two of his or her works must have been sold in that period. The first and last names of the relevant artists $($if any$)$ are in the alphabetical order by last name. Each name appears on one line of the screen. The various works sold appear on successive lines, in order of date of sale. If two of the artist works has not been sold above the expected selling price, but one specific piece of art has been bought and sold multiple times, the system will also display the artists in a separate list with comments.