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A three-dimensional plot of a solid in
\(xyz\)-space. The solid is bounded below by the
\(xy\)-plane, and its base is the triangular region
\(D\) with vertices
\((0,0)\text{,}\) \((2,0)\text{,}\) and
\((2,3)\text{.}\) The upper surface of the solid rises from the origin in a curved manner and is determined by the graph of the function
\(f(x,y)=x^2y\text{.}\) A cross section of the solid parallel to the
\(yz\)-plane is highlighted with a slider that can adjust the
\(x\)-value at which the cross section is located.