Create a pricing system for a company that makes individualized computers, such as you might see on a Web site. There are two kinds of computers: notebooks and desktop computers. The customer can...

Create a pricing system for a company that makes individualized computers, such as you might see on a Web site. There are two kinds of computers: notebooks and desktop computers. The customer can select the processor speed, the amount of memory, and the size of the disk drive. The customer can also choose either a CD drive (CD ROM, CD-RW), a DVD drive, or both. For notebooks, there is a choice of screen size. Other options are a modem, a network card, or a wireless network. You should have an abstract class Computer and subclasses DeskTop and Notebook. Each subclass should have methods for calculating the price of a computer, given the base price plus the cost of the different options. You should have methods for calculating memory price, hard drive price, and so on. There should be a method to calculate shipping cost.