(Exercise 6.1, 6.2) Write a Java 3D program to define and display an octahedron. The octahedron is one of the five Platonic solids. It has eight faces of triangles and six vertices: 0,0-1) Define the Octahedron class by extending the IndexedTriangleArray. Draw a scene graph for the program. chapter6.Exz (Exercise 6.1, 6.2) Write a Java 3D program to define and display an octahedron. The octahedron is one of the five Platonic solids. It has eight faces of triangles and six vertices: 0,0-1) Define the Octahedron class by extending the IndexedTriangleArray. Draw a scene graph for the program. chapter6.Exz