Draw a figure of regular octahedron and write the number of faces, vertices and edges.

Count the number of cubes in the given shape. (Write the answer in numeral)

The actual length of a painting was $2 \mathrm{m}$. If the length in the photograph is $k \mathrm{mm}$, then find the value of $k$. The scale used in the photograph is $1 \mathrm{mm} : 20 \mathrm{cm}$.