Valerie Allen is lead audit partner of Allen & Jones CPAs PC, and she will be performing substantive audit procedures of accounts receivable of the BarY Company. Traditionally, Valerie has used AU Section 530-C (Audit Sampling). However, in last years audit of BarY, the sample selected supported the conclusion that the accounts receivable balance was materially misstated. However, the accounts receivable balance was, in fact, not materially misstated after performing additional substantive audit work. Looking at this years audit planning, Valerie is considering using audit data analytics (ADA) to gather audit evidence on this years accounts receivable. Required: (a) Define audit sampling as defined under the AICPA AU-C Section 530, as well as the concepts of attribute sampling and variable sampling. In each concept, describe what is meant by risk of under reliance and the risk of overreliance, and the potential implications of projecting the sample results to the population. (b) Describe the concept of audit data analytics (ADA) and why it may be a superior audit methodology to traditional audit sampling tests.