Why do you think there is an «extend» relationship between the two use cases Search client details' and 'Add new client details? (b) Analyse the requirements for the application and develop an analysis class diagram that represents the domain: model. 1. State any assumptions you have made 2. Label all relationships and include their multiplicities. (c) When deriving a design eluss diagram from an analysis class diagram, an issue to consider is the multiplicity of relationships. How is this issue handled for the situation shown in the following class diagram? Illustrate with a design class diagram. Note: You need not include any operations ClassA ClassB 1 -x. int -y int Another issue to consider when deriving a design class diagram from an analysis class diagram is the navigability of relationships. There are several alternative solutions that can he generated in terms of the navigability. What is navigability of relationships? For your answer to part (b) above, what decisions would you make on the navigability issue for each of the relationships? Give justifications for your decisions. 3 9

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