a. Distinguish between the following pairs of concepts

i. elastic demand and inelastic demand

ii. Income elasticity of demand and cross elasticity of demand.

b. Using diagrams, explain how an increase in price will affect the total revenue of a producer if demand for his product is:
i. price elastic
ii. price inelastic 

a. What is public debt?

b. Outline any three reasons why counties borrow.

c. Highlight any three effects of a huge national debt on the economy of a country.

a. Distinguish between:
i. Growing population and a declining population

ii. overpopulation and underpopulation.

b. Explain any four disadvantages of a rapidly growing population in an economy