Write the difference between Figure 9.9 and Figure 9.11 (both are implementation of BasePlusCommissionEmployee class)

This is Figure 9.9

This is Figure 9.11

Class BasePluscommissionEnployee Class BasePluscomnissionEnployee (Fig. 9.9) extends the new version of class commis- sionEnployee with protected instance variables. BasePluscommissionEnployee objects inherit CommissionEmployee's protected instance variables firstNane, lastName, so cialSecurityNumber, grossSales and commissionRate-all these variables are now pro- tected members of BasePlusconmissionEmployee. As a result, the compiler does not generate errors when compiling line 45 of method earnings and lines 54-56 of method tostring. If another class extends this version of class BasePluscommissionEmployee, the new subclass also can access the protected members. I Fig. 9.9: BasePluscommissionEmployee.java 2 Base Plus CommissionEmployee inherits protected instance 3 variables from CommissionEmployee. 5 public class BasePlusCommissionEmployee extends CommissionEmployee 7 private double basesalary base salary per week Fig. 9.9 l BasePluscommissionEmployee inherits protected instance variables from Commission Employee. (Part I of 2) 380 Chapter 9 Object-Oriented Programming: inheritance 11 six-a rgument constructor 10 public Base PlusC firstName, String lastName ommissionEmployee(String String social Securit r, double gros sSales double commissionRate, double baseSalary) super(firstName, lastNane, socialSecurityNumber. 14 gross Sales commission Rate) 15 16 if basesalary is invalid throw exception if (baseSalary 0.0) throw new niegalArgumentExceptionC "Base salary must be 0.0"); this basesalary base salary 25 set base salary public void setBasesalaryCdouble basesalary) if (base salary 0.0) throw new niega ArgumentException( "Base salary must be 0-0"); this basesalary base salary return base salary public double getBasesalaryO base salary return