System Analysis and Design
The feasibilities studied in preliminary investigation is (are):

None of these
All of these
technical feasibility
economic feasibility
operational feasibility

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System Analysis and Design
System prototyping helps the designer in

all of the listed here
making the programmers understand how the system will function.
giving a demo of the software, to the system manager to whom he reports
communicating to the user, quickly, how the system, when developed, will look like and get a feedback.

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