Following are six situations that involve the audit risk model as it is used for planning audit evidence requirements. Risk 1 2 3 4 5 6 Acceptable 5% 5% 5% 5% 1% 1% audit risk Inherent 100% 40% 60% 20% 100% 40% risk Control 100% 60% 40% 30% 100% 60% risk Planned ? ? ? ? ? ? detection risk(PDR) Requirements: a. State the effect on PDR (increase or decrease) of changing each of the following factors While the other two remain constant: i. A decrease in acceptable audit risk. ii. A decrease in control risk iii. A decrease in inherent risk. iv. An increase in control risk b. Which situation requires the greatest amount of evidence and which requires the least