An AI system is tasked with planning a multi-day hiking trip. This requires several distinct steps: checking weather forecasts from a live data source, finding available campsites through an external booking system, calculating the total distance and elevation gain using a mapping tool, and finally, creating a day-by-day itinerary that synthesizes all this information. Given the complexity and reliance on external, specialized tools, which of the following approaches is most likely to produce a successful and reliable plan?

A user asks an AI assistant: 'What was the highest-grossing movie of 2019, and what was its main theme?' To answer this complex query by breaking it down into smaller, sequential tasks, arrange the following tasks in the most logical order.