Cement shop owner: Falls under self-employed as the individual owns and manages the business independently.
Construction worker: Classified as a casual wage worker as they work temporarily for wages on various projects.
Civil engineer: Regular salaried professional employed in companies or institutions.
For a hypothetical economy, assume the government increased infrastructural investment by ₹10,000 crore. 80% of additional income is consumed in the economy. Estimate the increase in income and the corresponding increase in consumption expenditure in the economy.