Perry's Pizza Palace orders their products, like cheese, meats, bread, vegetables and many others, from local farmers. All pizza dough is homemade and hand tossed in the pizzeria itself. Products that cannot be purchased locally due to off-season produce or items like seasonings are bought from vendor grocery wholesalers. Perry's Pizza Palace offers a variety of pizzas, such as classic pepperoni and cheese, cheeseburger pizza, chicken barbecue pizza, and supreme.

As of now, Perry's Pizza Palace uses a journal to record its purchases and orders. Any employee can add, edit, or strike out a journal entry. When new meats or vegetable products arrive, employees must record the type, total weight, and cost as a new journal entry. A spreadsheet is used to keep track of inventory totals. Wholesale and retail prices are manually calculated and entered into the POS software. Inventory is pulled out of stock on a first in, first out basis.

1. Create a use case diagram for an inventory and order system.
2. Create a class diagram for classes you would expect to find in Perry's Pizza Palace system.
3. Create a sequence diagram for some aspect of the new system.
4. Create a state transition diagram that describes a changing state in the system.
5. In your opinion, out of the three diagrams, which one is the most efficient. In other words, which of these cases shows the most information in the easiest and most understandable way possible?