Evaluate and adapt your rough sketches. Your team will now prepare a tender. To start, choose the best design in your team. This means you need to choose one sketch from all the rough sketches. To help you choose, answer the following questions:

Step 1: Does the structure appear to be made from aluminium? The structure uses thin wooden or plastic members typical of model kits, not the shiny, rigid look of aluminium. No Step 2: Does the structure appear to come from a model kit? It has joints and members consistent with popsicle sticks or balsa wood kits, not custom fabrication. Yes Step 3: Is the structure durable, and will it last long without sagging? The design has insufficient bracing and long unsupported spans, leading to sagging under load over time. No Step 4: Will the structure support cars and dynamic loads? The slender members and poor triangulation cannot handle vehicle weight or vibrations (dynamic loads). No Step 5: Will the structure withstand contact with water? Wooden/plastic materials absorb water, leading to weakening; no waterproofing visible. No Step 6: Does the structure meet these requirements? No – it fails durability, load-bearing, and environmental criteria. Step 7: Adaptations needed Use aluminium tubing for members (strong, lightweight, corrosion-resistant). Add diagonal bracing for triangulation to prevent sagging and handle dynamics. Shorten spans, increase member thickness for cars (e.g., 1:20 scale load ~50 kg). Ensure watertight joints. Rough sketch of original (poor design): ` Top view: Long straight beams, few diagonals /-------\ | | \---------/ Lacks triangles. ` Improved sketch (Warren truss style): &Top chord with diagonals: \\ & \\ &-------- -------- -------- -------- \\ &Bottom chord straight, verticals for support. Supports spans up to 1 m, load 100 kg with aluminium. Final adapted design meets all requirements: durable, no sag, supports dynamic car loads, water-resistant.