Savings accounts, checking accounts, and money market accounts are among the accounts offered by the bank to its clients. Customers may deposit money into their accounts (raising their balance),...

Savings accounts, checking accounts, and money market accounts are among the accounts offered by the bank to its clients. Customers may deposit money into their accounts (raising their balance), withdraw money from their accounts (decreasing their balance), and receive interest on their accounts. There is an interest rate on each account.

Assume you're developing a programme to compute the amount of interest a bank account has earned. Determine the issue domain's possible classifications.