Bank System Class with Deposit, Withdraw, and Balance Check

coinbase Design a bank system that supports the following operations: Deposit: Add a certain amount of money to a specified account. Withdraw: Withdraw a certain amount of money from a specified account. If the balance is insufficient, decline the operation. Check Balance: Check the current balance of a specified account. Please implement a class BankSystem to fulfill the above functionalities. Input Description Initialize account information when creating the bank system object, e.g., accounts = {'A': 1000, 'B': 2000}. Methods include deposit(account_id, amount), withdraw(account_id, amount), and check_balance(account_id). Test Cases Initialization: accounts = {'A': 1000, 'B': 2000} Deposit operation: deposit('A', 500), check_balance('A') should return 1500. Withdraw operation: withdraw('B', 1000), check_balance('B') should return 1000. Insufficient balance: withdraw('B', 1500), should return an error message or decline the operation. Check balance: check_balance('A') should return 1500. Example Input {'A': 1000, 'B': 2000} deposit('A', 500)