In an online store and retailer, when customer orders come in, the item master file and the customer master file of the data are both updated. If an item is out of stock, the inventory control department is notified. If the order is from a new customer, a new record is created in the customer master file. Picking slips are produced for the customer's order and sent to the warehouse. The customer will then receive a shipping statement. The shipping process involves getting the goods from the warehouse by matching the item details and customer files. The billing statement for the order will be sent to the customer. For the business described above:

A) specify the external entities,

B) specify the processes,

C) specify the data stores,

D) Draw the context Diagram,

E) Draw diagram 0 DFD,

F) What does it mean to maintain the balancing when creating a new level of the DFD?