When constructing a staffing schedule for the internal audit activity (IAA), which of the following criteria are most important for the chief audit executive to consider for the effective use of audit resources?

1. The competency and qualifications of the audit staff for specific assignments.

2. The effectiveness of IAA staff performance measures.

3. The number of training hours received by staff auditors compared to the budget.

4. The geographical dispersion of audit staff across the organization.