Describe three of the schemes that someone could use to commit revenue-related financial statement fraud

Your friend, Barbara, wants to invest her excess cash into one of the local neighborhood corporations to help stimulate the economy and to ensure her financial future. She is well aware of the big corporate frauds, which she has read about in the newspapers. She comes over to your office bearing the balance sheets, income statements, and statement of cash flows for the three corporations she is considering. Name and explain four of the ways these financial statements can help to detect fraud.