The following table gives the demand schedule for the The Greasy Spoon, a cafe shop in the Piccadilly circus

Price	Qunatity demanded
7	15
6	30
5	45
4	60
3	75
2	90
1	105

() Currently the firm charges $4 for its cheeseburgers. When the firm decreases the price of their cheeseburgers from 64 to $3, the number of daily sales increases from 60 to 75. Calculate the price elasticity of demand (show all your calculations) (4 marks) () Is demand elastic, unit-elastic, or inelastic? Explain why