The above figure shows the market for rice in Japan where price is expressed in dollars. S represents the domestic supply curve, and the horizontal line at P = $1 represents the world supply curve. Currently Q1 units are imported

The value of marginal product of the tenth worker hired by a firm is $50. What is the maximum wage that should be paid to the worker?

A) $5 B) $500 C) $50 D) $0.20

If the government collects $10,000 in tax revenue and turns around and spends $10,000 to build a new road, and the MPC is 0.5, national income

a. is unchanged b. increases by $5,000 c. increases by $10,000 d. increases by $15,000 e. increases by $20,000