I was asked to get the answer for this questions according to unit testing(just brief explaination), system integration(top-down, bottom-up, sandwich) diagrams with explaination and also system testing. Can anyone help me to get the answer for this question?

1. A customer's interaction with the system involves logging in, making withdrawal requests, deposit requests, and balance inquiry requests. If the customer logs in, there is a possibility (although rare) that the system will confiscate the card (for example, if the login is incorrect or if the bank determines that the customer's balance is significantly under zero). Card confiscation involves triggering an alert, which will be received by the branch manager of the bank. If the customer does a balance inquiry, this of course causes the system to check the balance. Checking the balance is also done when the customer requests a withdrawal, since the system must verify that enough money is in his account. In principle, checking the balance is a function that may be performed to support many use cases throughout the system. ATM System Login Confisca e Card Withdraw Cash Branch Manager Check Balance Customer Deposit Cash Balance Inquiry Figure 1.1. ATM System Use Case In V-model, there are a corresponding testing phase for each software development phase. It consists of a series of activities carried out methodologically to test the software product. Considering a system above, conduct a relevant series of testing which discuss the unit testing, integration testing and system testing. CSC2320D| Faculty of Creative Media and Information Technokgy Page 1 of 1