It is a hot day, and Bert is thirsty. Here is the value he places on each bottle of water:

Value of first bottle $7

Value of second bottle $5

Value of third bottle $3

Value of fourth bottle $1

a. From this information, derive Bert’s demand schedule. Graph his demand curve for bottled water.

b. If the price of a bottle of water is $4, how many bottles does Bert buy? How much consumer surplus does Bert get from his purchases? Show Bert’s consumer surplus in your graph.

c. If the price falls to $2, how does quantity demanded change? How does Bert’s consumer surplus change?

Explanation:

Please have a look at the attached photos, for this type of question, we need to draw!

a. From this information, derive Bert’s demand schedule. Graph his demand curve for bottled water.

Price                    Quantity Demanded

More than $7                           0

$5 to $7                                    1

$3 to $5                                   2

$1 to $3                                    3

$1 or less                                 4

b. When the price of a bottle of water was $ 4, Bert bought 2 bottles of water. Consumer surplus of him is shown as area A in Fig. He valued his first bottle of water at 7 dollars, but only pay 4 dollars for it, so the consumer surplus is $ 3. He valued his second bottle of water at 5 dollars, but only pay 4 dollars for it, so the consumer surplus of $ 1. Therefore, the total consumer surplus of $ 3 + $ 1 = $ 4, is in the area of A

c. When the price of a water bottle dropped from $ 4 to $ 2, Bert bought three bottles of water, increasing it. His consumer surplus includes both areas A and B in the figure, an increase in the number of areas B. He gets a $ 5 consumer surplus from the first bottle ($ 7 minus $ 2 ), $ 3 from the second bottle (minus $ 5 The $ 2 price) and $ 1 from the third bottle ($ 3 minus $ 2), with a total consumer surplus of $ 9. Therefore, consumer surplus increased $ 5 (which is the size of area B) when the price of a bottle of water dropped from $ 4 to $ 2.

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