When performing a walkthrough, which of the following statements are correct? 1. An auditor obtains all audit evidence regarding the completeness and accuracy of all transactions processed by management throughout the period. II. An auditor conducts a walkthrough typically using a combination of inquiry, observation, and inspection. III. An auditor asks probing questions to understand the process, as described directly by the process owner. IV. An auditor identifies the extent of audit evidence to obtain during testwork. I and II I and IV II and III III and IV