(a) What is economic integration?
(b) Outline the characteristics of a customs union.
The pie chart here represents the hypothetical output of farmers in a country in a particular year. The total output of the crops was 72,000 tonnes.

(a) Calculate the quantity of each product.
(b) (i) By what quantity is the export crops greater than the food crops?
(ii) Which crop contributed the least and by what quantity?
(iii) Which crop has the highest output?
(a) What is income elasticity of demand? The table below shows the various incomes and demand for different commodities.
| Income (N) | Quantity Demanded (kg) |
| A 20,000 | 120 |
| B 36,000 | 96 |
| C 40,000 | 160 |
| D 44,000 | 200 |
| E 45,000 | 240 |
| F 47,000 | 252 |
(b) Calculate the income elasticity between
(i) A and B
(ii) C and D
(iii) E and F
(c) What kind of good is between
(i) A and B?
(ii) C and D?