//This is the header file employee.h. //This is the interface for the abstract class Employee. #ifndef EMPLOYEE_H #define EMPLOYEE_H #include using namesapce std; class Employee { public: Employee(); Employee(const string& the Name, const string& theSsn); string getName() const; string getId() const; double getNetPay() const; void setName(const string& newName); void setId(const string& newId); void setNetPay(double newNetPay); virtual void printCheck const = 0; private: string name; string Id; double netPay; }; #endif Given the definition of the class Employee above, which of the following are legal? a. Employee joe; joe = Employee(); b. class HourlyEmployee : public Employee { public: HourlyEmployee();