"In our company, generally staff members have an ID number, name and address. An ID numbers is unique regardless of the staff location and is automatically generated once a new staff is employed. In addition, unless otherwise specified, a new staff is paid a flat-rate which is decided at the time of employment. Part-time staff do not pay taxes but are issued a maximum number of hours of work and are paid an addition to their flat-rate if they work more hours than the maximum specified. Seasonal staff have an income tax rate and are paid weekly and must have a season description assigned such as Easter, Christmas or Summer. Managers have a division of responsibility and a team size. Managers are paid a monthly salary, but pay no taxes. A Contractor is a special type of PartTime staff. Contractors must have a company from which they provide their contracted service and a phone number." Upon preliminary review, your senior developer thinks strongly that the following classes are the minimum necessary set required to design an appropriate solution: Staffmember, PartTime, Contractor, Seasonal, DivManager. a. Sketch a UML class diagram that models this system. Marks will be allocated as follows: i. Appropriate attributes and Encapsulation (visibility modifiers) [4 marks] ii. Use of inheritance [2 marks] iii. Class relationships (aggregation, composition, etc) [1 marks] b. Write the Java code based on your UML specified in part (a) for the following: i. The Staffmember class with appropriate getters and setters and a constructor to initialize all instance variables. [6 marks] ii. A tostring () method to format and output each attribute in the Staf fmember class with an appropriate label. Each attribute should be on a separate line. [2 marks] iii. A pay () method in the Staffmember class based on the description of how new staff is paid. This method should return a double which represents the payment for the staff. [2 marks] iv. The Contractor class with a constructor to initialize all instance variables (assume all child or parent classes have a constructor to initialize all their instance variables). [3 marks] v. A tostring0 method in the Contractor class to show the Contractor's full details including name and ID number, each printed on a separate line. [2 marks] c. Write Java code fragments to accomplish the following: i. Create an array to store a maximum of 10 Staffmembers. [1 mark] ii. Add four (4) Staffmembers to the array as folluws: 1 DivManager, 1 Contractor, 2 PartTime. [2 marks] iii. Write a loop which will show the payment made to e ich Staffmember in the array (assume the array has now been populated with additional staff from part vii above) [3 marks] d. Based on the code written in parts a-c above, give one example of each of the following: i. Polymorphism [1 mark] ii. Method overriding / method overloading (indicats which) [1 mark]
