Which of the following errors, each considered individually, would cause the trial balance totals to be unequal?

Cash received from customers on account was posted as a debit of $177 to Cash and a credit of $177 to Accounts Payable.

A payment of $561 to a creditor was posted as a debit of $5,619 to Accounts Payable and a credit of $561 to Cash.

A transaction was not posted.

A payment of $129 for insurance was posted as a debit of $79 to Prepaid Insurance and a credit of $79 to Cash.