Design review: The goal is to select a seedling tray cover prototype that satisfies all limits and then maximizes performance. Constraints: cost ≤ $17, mass ≤ 450 g, score ≥ 7. Prototype evidence: - Juniper-381: cost $21, mass 400 g, test scores 10/10/11, average 10.3 - Cobalt-382: cost $15, mass 470 g, test scores 9/8/9, average 8.7 - Nimbus-383: cost $14, mass 430 g, test scores 7/8/7, average 7.3 - Vertex-384: cost $16, mass 415 g, test scores 9/10/9, average 9.3 Which choice follows the engineering criteria?