Sequence Diagram:

The sequence diagram depicts the system and user's task and is generated for specific use case scenarios. The presented sequence diagrams here show the tasks performed by the customer and admin.

In the following diagrams, the first sequence diagram corresponds to the use case diagram 'Account creation', and the second diagram corresponds to the use case diagram of the 'Transaction creation', and the last diagram depicts the use case named as 'Transaction modification' in the product specification document. 1.

'Account Creation' sequence diagram:

As shown in the account creation sequence diagram, the first sequence is admin receives a request from the customer, and then as the following sequence admin creates an account via interacting front end. The next step is checking all details, and it is shown by the looping of the front end, and the subsequent sequence is the interaction of the front end and backend where the front end sends all the details for registration, i.e., account creation. The resulting sequence is the response message from the backend to the front end, shown with the dotted line. Then front end sends the response message to the admin i.e., account created.