class BankAccount (): interest_rate = 0.3 def __init__(self, name, number, balance): self.name = name self.num = number self.bal = balance def withdraw(self, amount): self.bal = self.bal - amount def deposit(self, amount): self.bal = self.bal + amount def add_interest(self): self.bal += self.bal * self.interest_rate 

Modify accounts.py to: 1. Put a comment after the instance and class variables to indicate what they are: a. i.e #class variable or #instance variable 2. Change the interest rate to be 2% 3. Modify withdraw() to check if the balance is able to cover the withdrawal amount. a. If not, raise an exception in the withdraw method) with the message "Exception: Withdrawal exceeds balance" and leave the balance unchanged. 4. Create a new method charge_fees() to deduct a $5 fee from the account