I am developing an online ordering system for a fictitious company . Need the diagrams, I have done the mock ups

Assignment

For this assignment, you will develop the design employing the following computer-aided software engineering (CASE) modeling tools:

• Use case
• Functional decomposition diagram
• Entity-relationship (E-R) diagram, data flow diagram (DF), or class diagram
• Sequence diagram
• Mock-up or storyboard of the user interface screens

The project deliverables are as follows:

• Update the System Requirements, Design, and Implementation Specification title page with new date.
• Update the previously completed sections based on the instructor’s feedback.
• System or Application DesignDevelop a high-level use case to represent the application as a whole.Develop a functional decomposition diagram to show all of the functions that the system or application will support.Develop an E-R diagram, class diagram, or a data flow diagram that effectively represents the data that are required for your application or system.Develop a sequence diagram to represent the timing of various activities within the application or system.Develop a mock-up or storyboard for the high-level interface screens.