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I need help in solving this programming question: Your task is to write a program that...

I need help in solving this programming question:

Your task is to write a program that simulates a vending machine. Users select a product and provide payment. If the payment is sufficient to cover the purchase price of the product, the product is dispensed and change is given. Otherwise, the payment is returned to the user. Name an appropriate class for implementing thsi program. Name two classes tha would not be appropriate and explain why.

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