Mystic Pizza wants to install a system to record orders for pizza and chicken wings. When regular customers call Mystic 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 cock. 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.$(70$ points$)$

a$.$ Write a summary of business activities for taking an order at Mystic Pizza. $(10$ points$)$

b$.$ Draw a context level diagram for Mystic Pizza. $(10$ points$)$

c$.$ Explode the context$-$level diagram showing all the major processes and draw Diagram $0.(15$

d$.$ Draw a logical child diagram for Diagram $0$ for the process that adds a new customer if he $o$ not currently in the database $($has never ordered from Mystic Pizza before$).$ In other words logical child diagram for adding new customer. $(15$ points$)$

e$.$ Draw a physical data flow diagram for Mystic Pizza. $(20$ points$)$