Use the venture-stage timeline shown in the visual. The team is at 'prototype testing' and needs feedback from likely users before the showcase. Text exhibit: Horizontal timeline titled 'Venture Stages and Support'. Four labeled milestones from left to right: '1 Idea: mentor questions'; '2 Prototype: makerspace support'; '3 Prototype testing: target-user testing group'; '4 Showcase launch: publicity and pitch coach'. Place small dots on a straight line, with short captions under each milestone. No milestone is highlighted. Which resource on the timeline should it use?