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Study the given hierarchical class diagram and additional information, and answer the questions that follow:
Sale
Company: string
unitPrice: double
qty: int
salesAmt: double
Sale(string, double, int);
getCompany():string;
getUnitPrice():double;
getQty():int;
getSalesAmt():double;
computeRevenue():double;
HardwareSale
installFee: double
hWSale(string, double, int, double)
computeRevenue():double
Constructor that initializes the respective data members to the pass in values. salesAmt is set to 0.
Returns the company
Returns the unit price
Returns the quantity
Returns the sales amount
Sets sales amount = unit price * quantity. Returns this computed value.
Invokes the base class constructor and sets install fees accordingly
Sets sales amount = unit price * quantity + install fees
(a) Write the class specification and code to implement the following classes, fulfilling the given requirements:
(i) Sale (base class)
(ii) HardwareSale(derived class)
A: No. If they're utilized properly, they increase encapsulation. You frequently require splitting a class in half while the two halves will have distinct numbers of instances o
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