The following table illustrates your demand schedule for apples at given prices and incomes.

Price per apple ($)	Quantity demanded (Income = $10,000)	Quantity demanded (Income = $12,000)
1	10	14
2	8	12
3	6	10
4	4	8
5	2	6
6	1	4

1. Calculate your income demand elasticity of demand as your income increases from $10,000 to $12,000 at the price of an apple of $4. Explain the result. (10 marks)