Based on the image, describe the functional structure of the economy.

Functional Structure of the Economy

• Tertiary Sector: Trade, banking, insurance, culture, sports, science, education, management.
• Secondary Sector: Engineering, light industry, food industry, ferrous and non-ferrous metallurgy, chemical industry.
• Primary Sector: Mining, coal, oil and gas extraction, agriculture.
• Quaternary Sector: (Not explicitly defined in detail but implied by its position as the highest sector, often associated with information, research, and high-level services.)