Write a code to implement the base and derived class, C/C++ Programming

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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

Sale(string, double, int);	Constructor that initializes the respective data members to the pass in values. salesAmt is set to 0.
getCompany():string;	Returns the company
getUnitPrice():double;	Returns the unit price
getQty():int;	Returns the quantity
getSalesAmt():double;	Returns the sales amount
computeRevenue():double;	Sets sales amount = unit price * quantity. Returns this computed value.
hWSale(string, double, int, double)	Invokes the base class constructor and sets install fees accordingly
computeRevenue():double	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)

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