please do 1b and 4 as most people doing it one way which is needs to be more explain. thank you

Case Study: An old school Ice cream shop that was quite popular in the neighborhood for many years, is suffering huge loss because of the opening of a nearby supermarket that hosts a variety of ice creams in their freezer section. The ice cream shop was once popular for their unique flavored ice creams but they are unable to predict the supply and demand causing many customers to get disappointed because they go out of stock every so often. The owner of the ice cream shop is your friend and asks you for advice to resolve this problem. Take him through the SDLC phases and present requirements, designs and a project plan for your proposed system to the owner. 1. a. Gather Requirements for the proposed system by using the Traditional and Modern methods. State which method(s) were used to gather requirements and enumerate the list of questions that you will ask. 1. b. Decompose the system into multiple subsystems/components and write requirements for each subsystem. 2. Draw Entity Relationship Diagram for the proposed system based on the requirements showing the Entities, Attributes and Cardinality between entities. 3. Draw Context and Level-O Data Flow Diagrams for the proposed system based on the requirements. 4. Develop a list of phases for this project and Prepare a Gantt Chart showing the timeline for each phase. Case Study: An old school Ice cream shop that was quite popular in the neighborhood for many years, is suffering huge loss because of the opening of a nearby supermarket that hosts a variety of ice creams in their freezer section. The ice cream shop was once popular for their unique flavored ice creams but they are unable to predict the supply and demand causing many customers to get disappointed because they go out of stock every so often. The owner of the ice cream shop is your friend and asks you for advice to resolve this problem. Take him through the SDLC phases and present requirements, designs and a project plan for your proposed system to the owner. 1. a. Gather Requirements for the proposed system by using the Traditional and Modern methods. State which method(s) were used to gather requirements and enumerate the list of questions that you will ask. 1. b. Decompose the system into multiple subsystems/components and write requirements for each subsystem. 2. Draw Entity Relationship Diagram for the proposed system based on the requirements showing the Entities, Attributes and Cardinality between entities. 3. Draw Context and Level-O Data Flow Diagrams for the proposed system based on the requirements. 4. Develop a list of phases for this project and Prepare a Gantt Chart showing the timeline for each phase