Based on a modern fashionable beauty around 25 years old, create a classical figure art sketch in the style of the portrait Jack drew for Rose in 'Titanic'. The character has exquisite facial features, a plump and well-proportioned figure, full breasts, a slender waist, and naturally beautiful body curves. Referencing 19th-century European classical life drawing works, adopt an elegant and relaxed reclining posture to express the natural proportions and soft lines of the female body. Use pure hand-drawn graphite pencil sketching techniques, with delicate hatching, soft light and shadow, and realistic paper texture to fully demonstrate the beauty of classical figure art. You are a figure sketching master with a unique artistic vision; please give full play to your artistic creativity to create a museum-grade classic piece of figure art. 9:16 vertical version.