Perfect Pizza wants to install a system to record orders for pizza and chicken wings. When regular customers call Perfect Pizza on the phone, they are asked their phone number. When the number is typed into a computer, the name, address, and last order date is automatically brought up on the screen. Once the order is taken, the total, including tax and delivery, is calculated. Then the order is given to the cook. A receipt is printed. Occasionally, special offers (coupons) are printed so the customer can get a discount. Drivers who make deliveries give customers a copy of the receipt and a coupon (if any). Weekly totals are kept for comparison with last year's performance. A summary of business activities for taking an order at Perfect Pizza is as follows:

1. Draw a context-level data flow diagram for Perfect Pizza using the following items:

2. Explode the above context-level diagram by drawing the logical data flow diagram 0 showing all the major processes using the following items:

Process names:

(1) Find and display customer record

(2) Take customer order

(3) Send order to cook

(4) Print customer receipt

(5) Deliver customer order

(6) Print weekly totals

Data stores:

(1) Customer master

(2) Product file

(3) Coupons

(4) Sale history

Entities:

(1) Customer

(2) Management

(3) Cook