Step 2:
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Question:
	Study the following code fragment, which you may assumed is taken from 
	the main method of an app that compiles and executes without error.
		VendingMachine vendingMachine1 = new VendingMachine(10,20);
		vendingMachine1 = null;
	Explain what happens in each line of the code fragment.  You do not need to draw a memory diagram, 
	but you should explain what would happen during and upon completion of the invocation of each statement.
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