#please include comments to explain Process: The user (client) requests data from the (server) database. The database sends back the data to the user. At acquisition of the data an XYPlot is drawn.

DataFile: USAStates2020.csv

User Layer: The user selects a country, and passes the country name to the Business Layer. Use TKinter to produce a UI for the user to select a country. Send the selected country to the Business Layer.

Business Layer: Receives the information from the User Layer and constructs a SQL query to send to the Data Layer. The query extracts the yearly data (1970,2020) for the requested country. The data may be queried either country year-by-year or in one query for year range. After receiving the JSON string back from the Data Layer, send the data to the Graphic Layer for plotting.

Data Layer: Construct a SQL Database based on the data from the DataFile. Processes the queries from the Business Layer. Sends back a JSON string for the requested query.

Graphic Layer: Create a graphics class to plot the MatPlotLib XYPlot.

Server Layer: The database access is controlled by the Server Socket. The client sends a query, and the server sends a JSON string.

Client Socket: Requests data from the server. After receiving the data from the server, the client displays the data.