The directors of ABC Limited, Alex and Mark are both qualifi ed accountants. Mark has taken on the role of preparing the fi nancial statements of the company and ensuring that these are fi led on time with the competent authorities. Alex on the other hand, is an auditor by profession and is preparing to audit the fi nancial statements for ABC Limited.Required:
(b) Advise whether Alex may audit the fi nancial statements of ABC Limited. (3 marks)
的算术平均值为2，则a值是（）。