(a) Define tariff.

(b) State the following laws:
i. The law of absolute cost advantage:
ii. The law of comparative cost advantage.

(c) Outline any four assumptions behind the law of comparative cost advantage

a. What is money?

b. Explain the following concepts:
i. value of money:
ii. demand for money,

(c) ldentify any four determinants of transaction demand for money

(a) Distinguish between competitive demand and joint demand.

(b) Using diagrams, explain how the following factors will affect the equilibrium price and quantity of commodity R in the market
i. an increase in the price of the Complement of commodity R:
ii.  an increase in the price of a substitute of commodity R
iii. imposition of an indirect tax on commodity

(a) Differentiate between subsistence farming and commercial farming.

(b) State four features of subsistence farming.

(c) Outlines two positive and two negative effects of mining on the economy of West African countries

A firm is at its optimum size when ___________