Use the following to answer questions: 
-(Table: Three Tax Structure Proposals) Look at the table Three Tax Structure Proposals. If one wished to use a proportional or flat tax structure, one should use proposal _____, in which the percentage of income taxed is _____.
Definitions:
Waterfall Development
A linear and sequential approach to software development, where each phase must be completed before the next one begins.
Agile Development
A methodology for software development that emphasizes flexibility, customer participation, and iterative progress.
End-User Development
The practice enabling end users to create or modify software applications or systems without the need for professional programming skills.
Joint Application Design
A collaborative process used in software development where customers, developers, and consultants work together to define and design system requirements.
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