Research Summary context: A student engineering team is comparing four solar desalination wick designs to move water upward in a classroom evaporation device. All raw measurements have been converted to 1-10 scores, with 10 best; any cost, mass, time, or energy-use measures are already converted so higher is better. The weighted decision rubric is: Maintenance score 32%, Recharge speed score 24%, Energy output score 20%, Storage stability score 14%, Cost score 10%. A design is eligible only if Cost score is at least 6 and Maintenance score is at least 7. Data display: Design A (Cobalt Solar module): Maintenance score=8, Recharge speed score=5, Energy output score=7, Storage stability score=5, Cost score=10; Design B (Harbor Solar prototype): Maintenance score=9, Recharge speed score=9, Energy output score=9, Storage stability score=8, Cost score=5; Design C (Mesa Solar array): Maintenance score=10, Recharge speed score=6, Energy output score=6, Storage stability score=7, Cost score=6; Design D (Ridge Solar system): Maintenance score=9, Recharge speed score=8, Energy output score=9, Storage stability score=7, Cost score=7. One team member points to Design A because it has the highest visible cost score value. Which design is optimal when both feasibility and weighted performance are considered?