Suppose the supply function for product X is given by QXS = - 30 + 2Px - 4Pz.

Suppose the supply function for product X is given by QXS = - 30 + 2Px - 4Pz.

a. How much of product X is produced when Px = $600 and Pz = $60?
b. How much of product X is produced when Px = $80 and Pz = $60?

c. Suppose Pz = $60. Determine the supply function and inverse supply function for good X. Graph the inverse supply function.