room booking system The design phase$$s outcome is to be used by the development team to directly implement the prototype. It should identify clearly how the system will be implemented. Moreover, it should define system components, their intercommunication and interfaces. In this phase, each group will at least create the following: $1.$ Data Flow Diagrams Context diagram and Level$-0$ DFD for all data flows. $2.$ Entity$-$Relationship Diagram A detailed ER diagram for all data models. $3.$ Class diagram Create a single domain model class diagram that specifies the data types as well as the operations $($methods$)$ to structurally model a scenario. $4.$ User Interface This is a detailed description of the actual user interface that is to be developed. This can be either a screenshot from an early prototype of your system or it can be a computer drawing using some wireframe $($mockup$)$ tool. You should design at least one user interface that is not a login or sign up page.