modelo 3d paraboloide

Create a 3D scientific visualization of a parabolic surface defined by the function z = x² + y². The plot must be fully three-dimensional, with smooth shading, realistic lighting, and a gradient colormap transitioning from cool colors at low values to warm colors at high values. Display the axes labeled X, Y, and Z, with numerical tick marks from -2 to 2 on X and Y, and from 0 to 8 on Z. Use a clean white background, subtle grid lines, and a perspective camera angle slightly above the surface so the curvature is clearly visible. Render the paraboloid with a glossy, reflective material to emphasize depth and shape.