4. (20 points) A retailer sells electronic entertainment centers. The customers have the choice to choose their TV. DVD player, and the sound-system. For simplicity, assume each of these components has the following properties: price, description, and warranty cost per year. We have the following manufactures for the different parts, assume each manufacturer has only one model for each of the following components: TV Sony Samsung Toshiba Sharp Sound System Sony Panasonic Toshiba DVD Player Panasonic Samsung The customer buys an entertainment center composed of the 3 components bundle listed above, however, it is the customer who decides which manufacturer/model to choose to be part of the 3- components bundle. Show the UML Design class diagram for thee above. Name and document the design pattern/patterns used in your application. Use the OO design/modeling methods covered during the class, and take into consideration that a new manufacturer may emerge in the future