3. RetailItem Exceptions Programming Challenge 4 of Chapter 6 required you to write a Retailītem class that holds data pertaining to a retail item. Write an exception class that can be instantiated...

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Extracted text: 3. RetailItem Exceptions Programming Challenge 4 of Chapter 6 required you to write a Retailītem class that holds data pertaining to a retail item. Write an exception class that can be instantiated and thrown when a negative number is given for the price. Write another exception class that can be instantiated and thrown when a negative number is given for the units on hand. Demon- strate the exception classes in a program.