In Figure the package on the left contains the classes in a payroll system. The package on the right is a payroll tax subsystem. What technique would you use to integrate the tax subsystem into the payroll system? Show how you would solve the problem by modifying the existing classes (in either figure). What new classes would you add? Use UMLnotation.

Payroll System Payroll Tax Subsystem Employee PRollTaxCalculator calcHourlyPayrollTax (payperiod, payAmt, depend) calcSalaryPayrollTax (month, salary, depend) PRTHourly (pp, amt, dep) PRTSal (pp, amt, dep)