Refer to the diagram. If labor is the only variable input, the marginal product of labor is at a:

A firm producing calculators and cell phones purchases new machinery that increases the productivity of producing calculators

Assuming that the number of calculators produced is measured on the horizontal axis and the number of cell phones produced is measured on the vertical axis, how will the introduction of the new machinery change the firm's production possibilities curve? A) The production possibilities curve will shift to the left. B) The production possibilities curve will shift rightward. C) The production possibilities curve will pivot rightward about the vertical axis. D) The production possibilities curve will pivot rightward about the horizontal axis.

In a small Asian country, it is estimated that changing the level of capital from $8 million to $12 million will increase real GDP from $5 million to $6 million

If the number of hours worked in the labor force does not change, what does this information tell you about the slope of the per-worker production function in this range? A) The slope is -4. B) The slope is 1/4. C) The slope is 4. D) The slope is 8.