To Do an Audit,it Is Necessary to Have Information in a Verifiable

Essay

To do an audit,it is necessary to have information in a verifiable form and some criteria by which the auditor can evaluate the information.
Required:A)What information and criteria would a public accounting firm use when auditing a company's financial statements? B)What information and criteria would a Canada Revenue Agency auditor use when auditing that same company's tax return?C)What information and criteria would an internal auditor use when performing an operational audit to evaluate whether the company's computerized payroll processing system is operating efficiently and effectively?