The need for government subsidies of irrigation produced

Which of the following variables do you need to know to calculate marginal cost?

i. change in total cost ii. marginal product of labor iii. change in quantity of labor used iv. change in output A) i and ii B) i and iv C) ii and iv D) i, iii, and iv E) Only ii

If workers and firms raise their inflation expectations

A) unemployment will fall. B) the short-run Phillips curve will be vertical. C) actual inflation will fall to match expected inflation. D) the short-run Phillips curve will shift upward.