Describe how software development productivity can be accomplished by the application of various Creational Design Patterns.

Research on the various design patterns described in Smith (2015) and Gamma et al (1999). Describe how software development productivity can be accomplished by the application of various Creational Design Patterns.
Describe each of them
Refer to the Software Solution Scenario described in Appendix A and also OO Software Design Patterns described in Gamma et al (1995) / Smith (2015 to answer the questions below:
You have been tasked to carry out the development of an online shopping system for iChipKart store. You are currently working on two use cases of the system: Checkout and Compute Price. An extract of the current analysis and design of these use cases are given in Appendix A.
Consider the two software design problems described below.

Design Problem 1 (Compute Price):
During the transition from Analysis to Design phase, you are designing the price computation for ease of incorporating different shipping and handling fees for different locations in the pricing policies. In your design, you also want to ensure that various policies in pricing computation are encapsulated appropriately for ease of maintenance.
Suggested candidate design patterns (Proxy, Strategy, Template Method)

Use UML diagram to design ComputePrice class. Then write the complete Java class

Design Problem 2 (Checkout):
During the transition from Analysis to Design phase, you are designing the functionality of free gifts for ease of offering and withdrawing the various gifts dynamically and for ease of modifying the price ranges of free gifts.
Suggested candidate design patterns (Chain of Responsibility, Composite, Iterator)

Use UML diagram to design Checkout class. Then write the complete Java class
NOTE: Do not forget to include relationships (use appropriate symbols, dotted arrow, diamond shape …etc)

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