Use (a) - (e) for corresponding patterns on your answer (or scantron) sheet. You may use a design pattern for more than a scenario. (a) Abstraction-Occurrence (b) General Hierarchy (c) Player-Role (d) Observer (e) Delegation 21. .................... design pattern is most-suitable for the modeling scenario that follows. Modeling Scenario - You are developing a method to compute employee's net income after taxes (say, in Canada - federal and provincial taxes) and other deductions (e.g., parking) - while the federal tax is the same nationwide, tax percentages differ by province for incomes. Assuming you can reuse the TaxUtility class, whose methods include calculateTaxByProvince(...) that calculates Employee's tax amount from inputs gross income and province. [2 points] 22. .................... design pattern is most-suitable for the modeling scenario that follows. Modeling Scenario - Assuming you are to develop a model for a portfolio managing system monies from each mutual fund is invested in various securities and a security can be stocks, bonds or other mutual funds. [2 points] 23. ..................... design pattern is most-suitable for the modeling scenario that follows. Modeling Scenario - Assuming you are to develop a model for a stock trading platform - while profiting from stock investments is the primary goal, losing is also inovitable. Thus, stock traders are expected to determine profit or loss on stocks rapidly and as soon as there is a drop or rise in prices for risk management purposes. [ 2 points] 24. ...................... design pattern is most-suitable for the modeling scenario that follows. Modeling Scenario - Assuming you are to develop a model for a vehicle dealership system - a car is uniquely identified by its VIN, while the body style, trim level, make and model may be shared among some instance. [ 2 points] 25. .................... design pattern is most-suitable for the modeling scenario that follows. Modeling Scenario - Assuming you are to develop a model for a Computer's file structure. Specifically, in a folder, there may be any number of other folders or files. [2 points]