Question: 1. Model the data processing that might take place in an e-mail system. You should model the mail-sending and mail-receiving processing separately. 2. A software

1. Model the data processing that might take place in an e-mail system. You should model the mail-sending and mail-receiving processing separately.

2. A software system model may be represented as a directed graph where nodes are the entities in the model and arcs are the relationships between these entities. Entities and relationships in the model may be labelled with a name and other information. Each entity in the model is typed and may be exploded into a sub-model. Draw a data model that describes the structure of a software system model. 3.0Model the object classes that might be used in an e-mail system. If you have tried point 1 describe the similarities and differences between the data processing model and the object model. 4 Develop an object model, including a class hierarchy diagram and an aggregation diagram showing the principal components of a personal computer system and its system software.

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