In devising a plan to improve recycling in the city, Sarah broke the problem into several parts (e.g., 1. installing more recycle bins on different streets throughout the city; 2. spreading education manuals about the importance of recycling; 3. building more recycling stations in the city; 4. establish a merit system to reward residents committed to recycling) and worked on each separately. What strategy is this in problem solving? Question 1 options: problem representation analogical thinking working backward problem analysis