1- Which one is the most popular and common database model used in business daily operation? Why are the advanges of this model compare to the other models ?

Give an example of an old DBMS that did not use this current model.

2- Suppose that you have a pizza store that need to maintain data for Products, Customers, Orders, and DeliveryDrivers. Use the model in question 1 to describe the connection between the data. You should draw a simple entity relationship (ER) diagram with blocks and arrows to show the relationship between these data.