) Bert, as a consumer, places the value on a pair of jeans as follows.

Value of firstpair: $70

Value of secondpair: $60

Value of thirdpair: $50

Value of fourthpair: $40

Value of fifthpair: $30

Value of sixthpair: $20

Value of seventh pair: $10

Ernie, as a producer, pays the following cost to produce jeans.

Cost of firstpair: $10

Cost of secondpair: $20

Cost of thirdpair: $30

Cost of fourthpair: $40

Cost of fifthpair: $50

Cost of sixthpair: $60

Cost of seventh pair: $70

Using the information given above, answer the following questions.

(1)If the price is $20, how many pairs of jeans will be demanded by Bert?

(2)If the price is $20, how many pairs of jeans will be supplied by Ernie?

(3)Explain the reason why $30 price is not an equilibrium price.

(4)What is behind the force that moves the price from $30 to the equilibrium level?