Suppose that at prices of $5, $4, $3, $2, and $1 for product z, the corresponding quantities supplied are 7, 6, 5,4,3 units, respectively. which of the following would increase the quantities supplied of z to, say, 14, 12, 10, 8, 6 units at these prices? a. improved technology for producing z.
b. an increase in the prices of the resources used to make z.
c. an increase in the excise tax on product z.
d. increases in the incomes of the buyers of z.