A banking system provides users with several services: (i) to check their

accounts to see recent transactions and balances; (ii) to pay bills online;

(iii) to buy and sell investments. All of these services require a secure log-

in. If the system crashes or the network connection fails during a

transaction, it is essential that all the financial data is left in a consistent

state.

1. Enlist the ACTORS and USE-CASES.
2. Draw a bounded use case model for these requirements.