2. Fill in the blanks below. In an unconstrained maximization problem: a. An activity should be increased if exceeds b. An activity should be decreased if exceeds c. The optimal level of activity occurs at the activity level for which equals d. At the optimal level of activity, is maximized, and the slope of equals the slope of e. If total cost is falling faster than total benefit is falling, the activity should be f. If total benefit is rising at the same rate that total cost is rising, the decision maker should g. If net benefit is rising, then total benefit must be rising at a rate (greater than, less than, equal to) the rate at which total cost is (rising, falling)