Which of the following statements is incorrect?
1
We can have a polyhedron with 8 faces, 6 vertices and 12 edges
2
We can have a polyhedron with 5 faces, 6 vertices and 9 edges
3
We can have a polyhedron with 20 faces, 12 vertices and 30 edges
4
We can have a polyhedron with 10 faces, 15 vertices and 20 edges