accounting infomation system

answer the question

Describe the basic business activities and related information processing operations performed in the revenue cycle. Discuss the key decisions that need to be made in the revenue cycle, and identify the information needed to make those decisions. Identify major threats in the revenue cycle, and evaluate the adequacy of various control procedures for dealing with those threats. Explain the basic business activities and related information processing operations performed in the expenditure cycle. Discuss the key decisions to be made in the expenditure cycle, and identify the information needed to make those decisions. Identify major threats in the expenditure cycle, and evaluate the adequacy of various control procedures for dealing with those threats