In the above table, when x increases from 4 units to 6 units, y changes by ________ units

Answer the following statement true (T) or false (F)

1) Higher user costs imply that a resource should be extracted more quickly. 2) The total cost of extracting and selling a resource in a given year is the sum of the extraction cost and user cost. 3) The higher a resource's current price, the more extraction should be delayed to a later period. 4) User cost is defined as the present value of the profit the company would earn if it delayed extraction until next year.

When a perfectly competitive firm weighs price and marginal cost and no externalities exist, it is weighing the full benefits to ________ of additional production against the full costs to ________ of that production.

A. society; society B. buyers; sellers C. government; government D. sellers; buyers