(b) The auditor has no obligation to perform any audit procedures regarding the financial statements after the date of the auditor's report. However, when, after the date of the auditor's report but before the date the financial statements are issued, a fact becomes known to the auditor that, had it been known to the auditor at the date of the auditor's report, may have caused the auditor to amend the auditor's report. Explain the auditor's obligation in the above situation