Create a receipt class that could be used by an automobile parts store. items to include as data members are receipt number, date of purchase, customer number, customer name and address, customer phone number, item number, description, unit price, and quantity purchased. for simplicity you may assume each receipt contains a single item number. include appropriate constructors and properties plus an additional method that calculates the total cost using the quantity and unit price. override the tostring ( ) method to return the information about the customer (name and phone number) and the total cost of the item purchased. create a second class to test your receipt class.

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A Carnot heat engine receives heat from a reservoir at 900$^\circ{}$C at a rate of 800 kJ/min and rejects the waste heat to the ambient air at 27$^\circ{}$C. The entire work output of the heat engine is used to drive a refrigerator that removes heat from the refrigerated space at -5$^\circ{}$C and transfers it to the same ambient air at 27$^\circ{}$C. Determine (a) the maximum rate of heat removal from the refrigerated space and (b) the total rate of heat rejection to the ambient air. Answers: (a) 4982 kJ/min, (b) 5782 kJ/min