In this question, you must draw your own UML sequence diagram for the following

scenario. Note: screenshots from other websites$/$tools will not be accepted $(0$ mark$)$

Part $1$: Consider the following required functionality of a "print$-$on$-$demand" service at PTUK.

Based on the following use case description of "place an order", draw a corresponding UML.

Sequence Diagram

The print$-$on$-$demand service provides customers with the possibility to print posters, flyers, or books on

demand. The customer should be able to select a type of product $($i$.$e$.,$ poster, flyer, or book$),$ a desired

quantity, and a paper type. In case a book needs to be printed, the customer can additionally choose

between hardback and paperback. Finally, the customer needs to provide a PDF file containing the desired

content.

For the customer to be able to place an order, he or she must have an account. The customer can create an

account by choosing a username$/$password combination. Furthermore, his or her address and credit card

number can be linked to the account, which is required when placing an order.

Once a customer has provided the information for an order, the system checks if all required information

is there, either given in the order $($type of product, quantity, etc.$)$ or in the account $($address and payment

information$).$ If any information is lacking, the system will inform the customer that it needs to be added

before the order can be placed. Once all information is in place, the order is placed, and the credit card

information is sent to the bank for approval. If the bank approves the card, the order is finalized.

A printing agent is in charge of actually performing the printing. He or she inspects the provided PDF files

of finalized orders. If a file does not meet the quality requirements, the customer will be informed about

this, and the order is temporarily put on hold until the customer has provided a new PDF file.

Finally, the administrator monitors if sufficient paper and ink stock is always present. Whenever the

amount of paper or ink is running low, an order must be placed with the appropriate supplier $($either the

paper or ink supplier$).$

Part $2$: Create a UML Use Case Diagram that shows the main functionalities $(5$ or $6)$ from the

previous scenario in $($Part $1).$

Part $1$: