How to solve $2\mathrm{.}4$&$2\mathrm{.}5$

We are working on project for

software engineer projects

management system about

online shopping systems and

we work on amazon

Phase $2$: System Analysis Document

$2\mathrm{.}4$ Data Flow Diagrams $($DFD$)$

$$ Context Level DFD: Create a high$-$level DFD that shows the system's interactions with external entities.

$$ Level $0$ DFD: Develop a DFD that illustrates the major processes, data stores, and data flows within the system.

$$ Level $1$ DFDs: Create detailed DFDs for specific processes or subsystems to provide a more granular view of the system's functionality.

$2\mathrm{.}5$ Process Specification

$$ Structured English: Use structured English to describe the logic of each process in a clear and concise manner.

$$ Decision Tables: Employ decision tables to represent complex decision$-$making processes.