three-legged stool 3d model

A lightweight three-legged round chair, made entirely of plastic. Seat: round, diameter at least 45cm, seat height about 45cm from the ground. Legs: three angled support legs with one integrated triangular shelf between them, for storage and structural stability. Backrest/Tabletop: the same rectangular board, thickness about 15–20mm. Central pillar: extends vertically from the center of the seat, with a cross-shaped slot at the top. Slots: - Vertical slot for inserting the short edge of the board, forming a vertical backrest (State A). - Horizontal slot for inserting the long edge of the board, forming a horizontal tabletop (State B). Requirement: generate two states, A (vertical backrest) and B (horizontal tabletop), with the board size remaining identical in both states. Overall style: minimalistic, modern, structurally sound.