Economic models come in the form of

Refer to the above diagram. Marginal utility:

A) increases at an increasing rate. B) becomes zero at 4 units of output. C) is found by dividing total utility by the number of units purchased. D) cannot be calculated from the total utility information.

Those who will lose from free trade are ________ factors in sectors that produce goods that are ________

A) immobile; also imported B) mobile; also imported C) immobile; exported D) mobile; exported E) mobile; untraded