Question 2: A Bank Account can be in credit, debit or have a balance of zero. The events that affect these states are Charge (when money is paid into the account), Payment (when money is taken out of the account) and Close (when the customer closes the account). When an account is opened it has a balance of zero. From that point the account will move between the states indicated above depending on the value of payments and charges made. Produce a state chart diagram for the Bank Account class. Your diagram should include any guard conditions related to transitions between states