(a) What is meant by production?
(b) Explain with examples, the following types of production
(i) Primary;
(ii) Secondary;
(iii) Tertiary. 

Give any five reasons why public corporations are established in Nigeria.
 

 Account for the decline in the contribution of agriculture to the Gross Domestic Product (GDP) of Nigeria. 
 

(a) What is Labour Force?
(b) Explain four factors affecting the size of the labour force. 

State any five reasons why the use of money has replaced the barter system in modern economic transaction.