How to do the Decorator pattern part

Design Patterns In a manufacturing plant, a product (such as a car or a computer) is assembled from other parts Manufactured parts, in turn, are assembled from smaller parts, which may themselves be basic or assembled parts . . o For example, a car might be assembled from a chassis, an engine and a body: in turn, the chassis might be assembled from a frame and sme wheels, etc. (he delails do o mat for the purposes of this exercise) Use the Ccposite pattern to write Java classes for an Assembly and an Item with methods for calculating the total price of any part o Each Item has a given price, and the price of an Assembly is just the total price of all the parts in the assembly o Draw a UMLclass diagram for your program, aking sure your code conforms to the Cmpite pattern Use the Decoratar pattern to allow discounted prices: discounts can apply to both basic and assembled parts, even already discounted parts o Extend the UML class diagram tor your program, making sure your code contorms to both the Compasite and Decorator patterns