Already did this part (please correct if it's wrong): Incorporate banking transactions of the following types:

- cash withdrawals at ATMs and bank teller counters

- cash deposits at ATMs and bank teller counters

- electronic deposits/credits like salary deposits, interest credits, etc.

- transfers between accounts of the same account holder

- transactions involving paper checks deposited

- transactions involving electronic checks

- credit/debit card purchases

Question: With the given UML diagram, how can I incorporate additional transaction like:

- external transfers between account of different account holders, possibly of different banks

- payments (bills, loan, mortagage, etc)

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