realistic 3D model of a middle-aged man pushing a lawn mower on a flat surface. The man should have an average build, short or slightly graying hair, and wear casual outdoor work clothes—such as a plain t-shirt or polo, cargo shorts or jeans, and sturdy sneakers or work shoes. He should be holding the lawn mower handles with both hands, walking forward in a natural mowing pose. The lawn mower should be a realistic push-type model with clean, detailed geometry, appropriate for suburban or residential use. Ensure correct human posture, clean topology, and realistic proportions. Neutral lighting preferred, suitable for placement in garden or yard scenes