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).