Using the example of a bookstore, list relevant data flows, data stores, processes, and source/sinks. Observe several sales transactions 1. Using LucidCharts, draw a level-0 diagram that represents the selling system at the store

In order to create an effective data flow diagram, how should one proceed?

Create a physical data flow child diagram for the following situation: The local PC users group holds meetings once a month with informative speakers, door prizes, and sessions for special interest groups. A laptop computer is taken to the meetings, and is used to add the names of new members to the group. The diagram represents an online process and is the child of the process 1, ADD NEW MEMBERS. The following tasks are included: 1. Key the new member information. 2. Validate the information, errors are displayed on the screen. 3. When al, the information is valid, a confirmation screen is displayed. The operator visually confirms that the data are correct and either accepts the transaction or cancels it. 4. Accepted transactions add new members to the MEMBERSHIP MASTER file, which is stored on the laptop hard drive. 5. Accepted transactions are written to a MEMBERSHIP JOURNAL file, which is stored on a second hard drive.

Draw an entity diagram diagram for a car rental business  identifying primary and foreign keys with the below attributes and cardinality Customer - Customer_ID (pk), Cust_Title, FirstName, LastName, DoB,  Telephone, Address1, Address2, City, State, ZipCode Employee - Emp_ID (pk), Firstname, lastname, Telephone, Address, City, State, ZipCode, hiredate, SSN Car - Car_ID (pk), Model, Make, Year, Color, capacity, Customer_ID (fk), Payment_ID (fk) Payment - Payment_ID (pk), PaymentType, PaymentMethod, payment amount, Signature, PaymentDate, Receipt_ID (fk) Receipt - Receipt_ID (pk), Bill_To, Receipt_Total, Total_Amt_Due, Amt_Paid, CreateDate, Payment_ID (fk)     Relationship and Cardinality Description Customer/Car: 1:M - one customer can have multiple cars on file, a car must belong to a customer Employee/Customer:1:M - One employee can have many customers to attend to but just one customer can be attended to at a time. Car/Payment: 1:M - one car can have multiple payment options on file,…