Design CrewAI Agent Roles and Workflow

Define the specific roles, backstories, and initial goals for at least three agents within your CrewAI system (e.g., Financial Data Auditor, Compliance Officer, Approval Manager). Detail how these agents will interact in a sequence to process a typical expense report or invoice reconciliation workflow. Specify how they will hand off information, what their individual decision points will be, and how they contribute to the overall task.