1. If the demand elasticity for a product is -2, and a profit-maximizing firm sells the product for $10, what is its marginal cost?
2. How would each of the following affect the firm's marginal, average, and average variable cost curves?
(1) an increase in wages
(2) a decrease in material costs
(3) the government imposes a fixed amount of tax
(4) the rent that the firm pays on the building that it leases decreases