$1.$ Thank you for your previous advice. Based on it$,$ the management has decided that their top priority project will be developing a smartphone application to increase customer sales and loyalty. The exact purpose, functionality, appearance, and other details of this application will depend on the case$-$study of the organization. In your role as a Systems Analyst, using your previous research on the organization and your assumptions and imagination, please address the following tasks:

a$.$ Clearly state the purpose of the smartphone application for the chosen organization.

b$.$ Describe the stakeholders who will be involved in the use and operation of this application.

c$.$ List the functional and non$-$functional requirements of the application.

d$.$ Identify any constraints and assumptions for the application.

e$.$ Create a Context Diagram $($Level $0)$ for the application.

f$.$ Create a Data Flow Diagram $($DFD$)$ at Level $1$ and Level $2$ for the application.

g$.$ Produce a set of use case diagrams for the application. Also, use "include", "extend" or any other relationship.

h$.$ Produce an Entity Relationship Diagram $($ERD$)$ for the application, also specify the relationship based on $1$:$1,1$:M and M: M$.$ Please redo the diagram.

Additionally, in the context of "Designing Effective Output and Input," provide examples of input and output data for this application.

$2.$ Imagine that you are going to present your work to the different stakeholders. Take a critical look at the diagrams you created for Question $1.$ Do you think they adequately support the original requirements? Are they semantically accurate and comprehensive? Is there any missing information? How can they be expanded or improved?

$3.$ System Analyst produces various types of documents, including feasibility reports, requirement specifications, design documents, test plans, and user manuals. Each document serves a unique purpose, contains specific content, and targets a particular audience. Finally provide the purpose, features, content, and audience for each type of documentation.

$4.$ Structure the document into three main parts: introduction, development, and conclusion. Additionally, provide an analysis of the executive summary.