1) Intangible production is: 1. writing scientific papers and literary works of art;
2. drawing by the artist of a picture;
3. printing of scientific works and literary works;
4. reproduction of paintings;
5. true 1 and 2.

2) Economic interest is a manifestation of:
1. human needs
2. motivating person to economic activity
3. human perceived needs
4. the conscious need of the person who motivates him to a certain action
5. any motive for economic activity