Problems 9-12 are based on the model of demand and supply for coffee as shown inFigure 3.11. You can graph the initial demand and supply curves by using the following values, with all quantities in millions of pounds of coffee per month:

Price per Dozen ($)

Quantity Demanded

Quantity Supplied

3

40

10

4

35

15

5

30

20

6

25

25

7

20

30

8

15

35

9

10

40

9.Suppose the quantity demanded rises by 20 million pounds of coffee per month at each price. Draw the initial demand and supply curves based on the values given in the table above. Then draw the new demand curve given by this change, and show the new equilibrium price and quantity.

10.Suppose the quantity demanded falls, relative to the values given in the above table, by 20 million pounds per month at prices between $4 and $6 per pound; at prices between $7 and $9 per pound, the quantity demanded becomes zero. Draw the new demand curve and show the new equilibrium price and quantity.

11.Suppose the quantity supplied rises by 20 million pounds per month at each price, while the quantities demanded retain the values shown in the table above. Draw the new supply curve and show the new equilibrium price and quantity.

12.Suppose the quantity supplied falls, relative to the values given in the table above, by 20 million pounds per month at prices above $5; at a price of $5 or less per pound, the quantity supplied becomes zero. Draw the new supply curve and show the new equilibrium price and quantity.